LETTER FROM RUDOLF BRANDT TO RASCHER, UNDATED, INFORMING HIM THAT PRISONERS WOULD BE MADE AVAILABLE FOR HIGH-ALTITUDE RESEARCH

AK/104a/LO Bra/V

[Stamp unintelligible May 2 (?) 1941]

SS Untersturmfuehrer Sigmund Rascher M. D.

Munich

Trogerstr. 56

Dear Dr. Rascher:

Shortly before flying to Oslo, the Reich Leader SS gave me your letter of 15 May 1941, for partial reply.

I can inform you that prisoners will, of course, be gladly made available for the high-flight researches. I have informed the Chief of the Security Police of this agreement of the Reich Leader SS, and requested that the competent official be instructed to get in touch with you.

I want to use the opportunity to extend my cordial wishes to you on the birth of your son.

I shall refer as soon as possible to the second part of your letter.

By order

Heil Hitler!

[initials] R Br [Rudolf Brandt]

SS Sturmbannfuehrer

[illegible markings]

LETTER FROM RUDOLF BRANDT TO SIEVERS, 21 MARCH 1942,
CONCERNING RASCHER’S PARTICIPATION IN HIGH-ALTITUDE
EXPERIMENTS

The Reich Leader SS Personal Staff

Journal No. AR 704/2 A/Bn.

To the Reich Chief Manager [Reichsgeschaeftsfuehrer] of the “Ahnenerbe”

SS Obersturmbannfuehrer Sievers

Berlin—Dahlem

Dear Comrade Sievers,

I refer to your inquiry of 9 March 1942 B/151/r1 S/Wo—concerning Dr. Rascher.

LETTER FROM RASCHER TO HIMMLER, 5 APRIL 1942, AND REPORT,
UNDATED, ON HIGH-ALTITUDE EXPERIMENTS

Sigmund Rascher, M. D.

5 April 1942

[Marginal note] Very interesting. 8-4-42.

[Apparently by Himmler]

Highly esteemed Reich Leader:

Enclosed is an interim report on the low-pressure experiments so far conducted in the concentration camp of Dachau. May I ask you respectively to treat the report as secret?

A few days ago Reich Physician SS [Reichsarzt SS] Professor Dr. Grawitz made a brief inspection of the experimentation plant. Since his time was very limited, no experiments could be demonstrated to him. SS Obersturmbannfuehrer Sievers took a whole day off to watch some of the interesting standard experiments and may have given you a brief report. I believe, highly esteemed Reich Leader, that you would be extraordinarily interested in those experiments. Is it not possible that on the occasion of a trip to southern Germany you have some of the experiments demonstrated to you? If the results so obtained by the experiments are confirmed by further experimentation, entirely new data will be secured for science; simultaneously, entirely new aspects will be opened to the Luftwaffe.

I hope that, thanks to the intended efforts of SS Obersturmbannfuehrer Sievers, the Luftwaffe will make no difficulties from now on. I am very much indebted to Obersturmbannfuehrer Sievers as he has shown a very active interest in my work in every respect.

I thank you respectfully, highly esteemed Reich Leader, for the generous realization of my proposition to conduct such experiments in the concentration camp.

With my best wishes for your personal well-being, I am

With Heil Hitler

Gratefully yours,

[Signed] S. Rascher

FIRST INTERIM REPORT ON THE LOW-PRESSURE CHAMBER
EXPERIMENTS IN THE CONCENTRATION CAMP OF DACHAU

1. The object is to solve the problem of whether the theoretically established norms pertaining to the length of life of human beings breathing air with only a small proportion of oxygen and subjected to low pressure correspond with the results obtained by practical experiments. It has been asserted that a parachutist, who jumps from a height of 12 km. would suffer very severe injuries, probably even die, on account of the lack of oxygen. Practical experiments on this subject have always been discontinued after a maximum of 53 seconds, since very severe bends [Hoehenkrankheit] occurred.

2. Experiments testing the length of life of a human being above the normal breathing limits (4, 5, 6 km.) have not been conducted at all, since it has been a foregone conclusion that the human experimental subject [Versuchsperson—VP] would suffer death.

The experiments conducted by myself and Dr. Romberg proved the following:

Experiments on parachute jumps proved that the lack of oxygen and the low atmospheric pressure at 12 or 13 km. altitude did not cause death. Altogether 15 extreme experiments of this type were carried out in which none of VP’s died. Very severe bends together with unconsciousness occurred, but completely normal functions of the senses returned when a height of 7 km. was reached on descent. Electrocardiograms registering during the experiments did show certain irregularities, but by the time the experiments were over the curves had returned to normal and they did not indicate any abnormal changes during the following days. The extent to which deterioration of the organism may occur due to continuously repeated experiments can only be established at the end of the series of experiments. The extreme fatal experiments will be carried out on specially selected VP’s, otherwise it would not be possible to exercise the rigid control so extraordinarily important for practical purposes.

The VP’s were brought to a height of 8 km. under oxygen and then had to make 5 knee bends with and without oxygen. After a certain lapse of time, moderate to severe bends occurred and the VP’s became unconscious. However, after a certain period of accustoming themselves to the height of 8 km. all the VP’s recuperated and regained their consciousness and the normal functions of their senses.

Only continuous experiments at altitudes higher than 10.5 km. resulted in death. These experiments showed that breathing stopped after about 30 minutes, while in 2 cases the electrocardiographically charted action of the heart continued for another 20 minutes.

The third experiment of this type took such an extraordinary course that I called an SS physician of the camp as witness, since I had worked on these experiments all by myself. It was a continuous experiment without oxygen at a height of 12 km. conducted on a 37-year-old Jew in good general condition. Breathing continued up to 30 minutes. After 4 minutes the VP began to perspire and to wiggle his head, after 5 minutes cramps occurred, between 6 and 10 minutes breathing increased in speed and the VP became unconscious; from 11 to 30 minutes breathing slowed down to three breaths per minute, finally stopping altogether.

Severest cyanosis developed in between and foam appeared at the mouth.

At 5-minute intervals electrocardiograms from three leads were written. After breathing had stopped, the electrocardiogram was continuously written until the action of the heart had come to a complete standstill. About ½ hour after breathing had stopped, dissection was started.

Autopsy Report

When the cavity of the chest was opened the pericardium was filled tightly (heart tamponade). Upon opening of the pericardium 80 cc. of clear yellowish liquid gushed forth. The moment the tamponade had stopped, the right auricle began to beat heavily, at first at the rate of 60 actions per minute, then progressively slower. Twenty minutes after the pericardium had been opened, the right auricle was opened by puncturing it. For about 15 minutes, a thin stream of blood spurted forth. Thereafter clogging of the puncture wound in the auricle by coagulation of the blood and renewed acceleration of the action of the right auricle occurred.

One hour after breathing had stopped, the spinal marrow was completely severed and the brain removed. Thereupon the action of the auricle stopped for 40 seconds. It then renewed its action, coming to a complete standstill 8 minutes later. A heavy subarchnoid oedema was found in the brain. In the veins and arteries of the brain a considerable quantity of air was discovered. Furthermore, the blood vessels in the heart and liver were enormously obstructed by embolism.

The anatomical preparations will be preserved and so I shall be able to evaluate them later.

The last-mentioned case is to my knowledge the first one of this type ever observed on man. The above-described heart actions will gain particular scientific interest, since they were written down with an electrocardiogram to the very end.

The experiments will be continued and extended. Another interim report will follow after new results have been obtained.

[Signed]  Dr. Rascher

LETTER FROM RUDOLF BRANDT TO RASCHER, 13 APRIL 1942,
REGARDING HIS SUCCESS WITH HIGH-ALTITUDE EXPERIMENTS

1174/42 BRa/V

Fuehrer Headquarters, 13 April 1942

Top Secret

SS Untersturmfuehrer Rascher, M. D.

Munich, Trogerstrasse 56

Dear Comrade Dr. Rascher,

Your report of 5.4.1942 has been seen by the Reich Leader SS today. The tests on which SS Obersturmbannfuehrer Sievers gave a brief report interested him very much.

For the further tests I wish you a continuation of the success you have had so far.

Best regards also to your wife.

Heil Hitler!

Yours,

[Signed]  B. [R.] Brandt

SS Sturmbannfuehrer

LETTER FROM HIMMLER TO RASCHER, 13 APRIL 1942, REQUESTING
A REPETITION OF HIGH-ALTITUDE EXPERIMENTS ON PRISONERS
CONDEMNED TO DEATH

The Reich Leader SS

Fuehrer Headquarters, 13 April 1942

SS Untersturmfuehrer Dr. Rascher

Munich 27, Trogerstrasse 56

Dear Dr. Rascher:

I want to answer your letter with which you sent me your reports. Especially the latest discoveries made in your experiments particularly have interested me. May I now ask you the following:

1. This experiment is to be repeated on other men condemned to death.

2. I would like Dr. Fahrenkamp to be taken into consultation on these experiments.

3. Considering the long-continued action of the heart the experiments should be specifically exploited in such a manner as to determine whether these men could be recalled to life. Should such an experiment succeed, then, of course, the person condemned to death shall be pardoned to concentration camp for life.

Please keep me further informed on the experiments.

Kind regards and

Heil Hitler!

Yours

[Signed]  H. Himmler

2. Chief of the Security Police and SD.

3. SS Brigadefuehrer Gluecks.

Copy for your information.

TELETYPE FROM RASCHER TO RUDOLF BRANDT, 20 OCTOBER 1942,
REQUESTING CLARIFICATION ON THE PARDON GRANTED BY
HIMMLER

Reich Security Main Office

Communication

RFSS Munich—Teletype No. 2020, 20 October 1942, 5:25 p. m.

To: SS Obersturmbannfuehrer Dr. Brandt

Field Command Post [Feldkommandostelle] Hegewald

Highly esteemed Obersturmbannfuehrer:

Will you please clarify the following case with the Reich Leader SS as soon as possible?

In communication RFSS [Reich Leader SS] of 13-1-42 under paragraph 3 it is ordered that if prisoners in Dachau condemned to death live through experiments which have endangered their lives, they should be pardoned. As up to now only Poles and Russians were available, some of whom had been condemned to death, it is not quite clear to me yet as to whether the above-mentioned paragraph also applies to them, and whether they may be pardoned to concentration camp for life after having lived through several very severe experiments.

Please answer by teletype via Adjutant’s Office, RFSS, Munich.

Obedient Greetings,

Heil Hitler!

Yours

[Signed] S. Rascher

TELETYPE FROM RUDOLF BRANDT TO SCHNITZLER, 21 OCTOBER 1942, CONCERNING THE PARDON GRANTED BY HIMMLER

Teletype

To SS Obersturmfuehrer Schnitzler

Munich

Please inform SS Untersturmfuehrer Dr. Rascher with regard to his teletype inquiry that the instruction given some time ago by the Reich Leader SS concerning amnesty of test persons does not apply to Poles and Russians.

[Signed] Brandt

SS Obersturmbannfuehrer

21 October 1942

Bra/Dr.

LETTER FROM RASCHER TO HIMMLER, 16 APRIL 1942, REPORTING ON HIGH-ALTITUDE EXPERIMENTS WITH FATAL RESULTS AND ON EXPERIMENTS CONDUCTED TOGETHER WITH ROMBERG

Munich, Trogerstrasse 56, 16 April 1942

Highly esteemed Reich Leader:

May I thank you for your letter of 13 April. I am delighted with the great interest which you, highly esteemed Reich Leader, are taking in the experiments and their results. I thank you for the inspiration you have given me in your letter.

FILE NOTE FOR SS OBERSTURMFUEHRER SCHNITZLER, 28 APRIL 1942

Frau Rascher was here today in the office and stated the following to me for you in a few words:

Oberstabsarzt Dr. Weltz still insists on participation in the experiments and on full responsibility. If not, the assignment of Dr. Rascher to the Weltz Institute must be changed. Weltz personally is not interested in these experiments. RLM [The Reich Air Ministry] asks Oberstabsarzt Dr. Weltz how long the experiments will last and whether it is justifiable to detail a medical officer for so long a time. RLM demands from Weltz an opinion on the experiments which he, however, cannot give, unless he is fully informed about them. Weltz will be in Berlin with Generaloberstabsarzt Hippke on Friday. Weltz demands a statement by Friday as to whether he should consider himself as still participating in the experiments, or whether it is requested that he should not participate in the experiments.

The assignment of Dr. Rascher must immediately be changed to “Assignment to Aviation Test Institute Berlin—Adlershof, Dachau Branch” (not Weltz Institute), because Weltz—as he stated—intends to cancel the assignment immediately, if he is not to participate in it.

For personal confidential information

Dr. Weltz confidentially informed Dr. Rascher that there is great mistrust against him in the RLM because of the experiments (SS membership); there is also animosity in the air force administrative command (Luftgau) Munich for this reason.

Munich, 28 April 1942.

Gr.

LETTER FROM RASCHER TO HIMMLER, 11 MAY 1942, AND SECRET REPORT CONCERNING HIGH-ALTITUDE EXPERIMENTS

Sigmund Rascher M. D.

Munich, Trogerstrasse 56, 11 May 1942

Highly esteemed Reich Leader:

Enclosed I am forwarding a short summary on the principal experiments conducted up to date. A detailed report on the practical as well as the theoretical results will take some more time. I shall hurry. Since the material has to be processed the exploitation of the pathological preparations will take about ½ year though the Kaiser Wilhelm Institute for Brain Research will help us, I hope.

Tonight I succeeded in seeing Dr. Fahrenkamp who has relatively recovered. He appeared to be very interested and I think there will be a fine and fruitful cooperation. Dr. Fahrenkamp who has an enormous knowledge most amiably promised to help me in everything. He will give to you himself his opinion on my heart experiments. From our conversation I have had the impression that a great field of work will open up to me yet. I thank you, highly esteemed Reich Leader, for having opened these opportunities to me to such an extent.

Unfortunately, the extension of my assignment has not been settled yet; in accordance with the present regulations, my assignment will be terminated on 15 May.

Thanking you again, I am with most obedient greetings and

Heil Hitler!

Yours gratefully,

[Signed] S. Rascher

Munich, 11 May 1942

SECRET REPORT

Based on results of experiments which up to now various scientists had conducted on animals only, the experiments in Dachau were to prove whether these results would maintain their validity on human beings.

1. The first experiments were to show whether the human being can gradually adapt himself to higher altitudes. Some 10 tests showed that a slower ascent without oxygen taking from 6 to 8 hours kept the functions of the senses of the various VP’s [Versuchspersonen—human experimental subjects] fully normal up to a height of 8,000 meters. Within 8 hours several VP’s had reached a height of 9.5 kilometers without oxygen when bends occurred suddenly.

2. Normally it is impossible to stay without oxygen at altitudes higher than 6 kilometers. Experiments showed however that after ascent to 8,000 meters without oxygen, bends combined with unconsciousness lasted only about 25 minutes. After this period the VP’s had mostly become accustomed to that altitude; consciousness returned, they could make knee bends, showed a normal electrocardiograph and were able to work (60 to 70 percent of the cases examined).

3. Descending tests on parachutes (suspended) without oxygen.

These experiments proved that from 14 kilometers on down severest bends occurred which remained until the ground was reached. The detrimental effects caused by these experiments manifested themselves at the beginning as unconsciousness, and subsequently as spastic and limp paralysis, catotomy, stereotypy, and as retrograde amnesia lasting several hours. About 1 hour after the end of the experiment the VP’s for the most part were still disoriented as to time and locality. The blood picture often showed a shift to the left; albumen and red and white blood corpuscles were regularly found in the urine after the experiment; cylinders were sometimes found. After several hours or days the blood and urine returned to normal. The changes of the electrocardiograph were reversible.

Contrary to descending tests on parachutes without oxygen, descending tests with oxygen were carried out from heights up to 18 kilometers. It was proved that on the average the VP’s regained the normal function of their senses at 12 to 13 kilometers. No disturbances of general conditions occurred during any of these experiments. Brief unconsciousness at the beginning of the experiment caused no lasting disturbances. Urine and blood showed only a slight change.

4. As the long time of descent on parachutes, under actual conditions, would cause severe freezing even if no detrimental effects were caused by lack of oxygen, VP’s were brought by sudden decreases in pressure with a cutting torch from 8 to 20 kilometers, simulating the damage to the pressure-machine of the high-altitude airplane. After a waiting period of 10 seconds, corresponding to stepping out of the machine, the VP’s were made to fall from this height with oxygen to a height where breathing is possible. The VP’s awoke between 10 and 12 kilometers and at about 8 kilometers pulled the parachute lever.

5. In experiments of falling from the same height without oxygen, the VP’s regained normal function of their senses only between 2 and 5 kilometers.

6. Experiments testing the effect of pervitin on the organism during parachute jumps, proved that the severe after-effects, as mentioned under No. 3, were considerably milder. The ability to withstand the conditions at high altitudes was only slightly improved, while the bends, since they were not noticed, occurred suddenly (restraint-loosening effects of pervitin).

7. Dr. Kliches, of the Charles University in Prague, reports in the publication of the Reich Research Council: “By prolonged breathing of oxygen, human beings should theoretically be kept fully fit up to 13 kilometers. In practice, the limit is around 11 kilometers. Experiments which I carried out in this connection proved that with pure oxygen no lowering of the measurable raw energy (ergometer) was noticeable up to 13.3 kilometers. The VP’s merely became unwilling since pains of the body cavities grew too severe, due to the lowering of pressure between body and thin air. When pure oxygen was inhaled bends occurred in all 25 cases only at heights above 14.2 kilometers.”

As practical result of the more than 200 experiments conducted at Dachau, the following can be assumed:

Flying in altitudes higher than 12 kilometers without pressure-cabin or pressure-suit is impossible even while breathing pure oxygen. If the airplane pressure-machine is damaged at altitudes of 13 kilometers and higher, the crew will not be able to bail out of the damaged plane themselves since at that height the bends appear rather suddenly. It must be requested that the crew should be removed automatically from the plane, for instance, by catapulting the seats by means of compressed air. Descending with opened parachute without oxygen would cause severe injuries due to the lack of oxygen, besides causing severe freezing; consciousness would not be regained until the ground was reached. Therefore the following is to be requested: 1. A parachute with barometrically controlled opening. 2. A portable oxygen apparatus for the jump.

For the following experiments Jewish professional criminals who had committed race pollution were used. The question of the formation of embolism was investigated in 10 cases. Some of the VP’s died during a continued high-altitude experiment; for instance, after one-half hour at a height of 12 kilometers. After the skull had been opened under water an ample amount of air embolism was found in the brain vessels and, in part, free air in the brain ventricles.

To find out whether the severe psychic and physical effects, as mentioned under No. 3, are due to the formation of embolism, the following was done: After relative recuperation from such a parachute descending test had taken place, however, before regaining consciousness, some VP’s were kept under water until they died. When the skull and the cavities of the breast and of the abdomen had been opened under water, an enormous amount of air embolism was found in the vessels of the brain, the coronary vessels, and the vessels of the liver and the intestines, etc.

That proves that air embolism, so far considered as absolutely fatal, is not fatal at all, but that is reversible as shown by the return to normal conditions of all the other VP’s.

It was also proved by experiments that air embolism occurs in practically all vessels even while pure oxygen is being inhaled. One VP was made to breathe pure oxygen for 2½ hours before the experiment started. After 6 minutes at a height of 20 kilometers, he died and at dissection also showed ample air embolism, as was the case in all other experiments.

At sudden decreases in pressure and subsequent immediate falls to heights where breathing is possible, no deep reaching damages due to air embolism could be noted. The formation of air embolism always needs a certain amount of time.

[Signed] Dr. Rascher

LETTER, 29 SEPTEMBER 1942, AND REPORT, 28 JULY 1942, FROM ROMBERG AND RUFF TO HIMMLER CONCERNING EXPERIMENTS ON RESCUE FROM HIGH ALTITUDES

German Aviation Research Institute

Berlin-Adlershof, Rudower Ch. 16-25

[Stamp] Secret

To the Reich Leader SS

Berlin SW 11

Prinz-Albrechtstr. 8

Your Ref.

Your communication of DVL-Ref.      Day

Re: Report “Experiments on Rescue from High Altitudes”

Enclosed we submit copies Nos. 2, 3, and 4 of the report “Experiments on Rescue from High Altitudes” for your files.

German Aviation Research Institute

per procura

[Signed] Dr. Romberg

L. Ruff

[handwritten] 1943

Top Secret [stamp]