Shalauroff, who concluded from his own experience, that the attempt to double Tschukotskoi Noss, though difficult, was by no means impracticable, was not discouraged by his former want of success from engaging a second time in the same enterprize: he accordingly fitted out the same shitik, and in 1764 departed as before from the river Lena. We have no positive accounts of this second voyage; for neither Shalauroff or any of his crew have ever returned. The following circumstances lead us to conclude, that both he and his crew were killed near the Anadyr by the Tschutski, about the third year after their departure from the Lena. About that time the Koriacs of the Anadyr refused to take from the Russians the provision of flour, which they are accustomed to purchase every year. Enquiry being made by the governor of Anadirsk, he found that they had been amply supplied with that commodity by the Tschutski. The latter had procured it from the plunder of Shalauroff's vessel, the crew of which appeared to have perished near the Anadyr. |No Account of this Expedition, he and his Crew being killed by the Tschutski.| From these facts, which have been since confirmed by repeated intelligence from the Koriacs and Tschutski, it has been asserted, that Shalauroff had doubled the N. E. cape of Asia. But this assertion amounts only to conjecture; for the arrival of the crew at the mouth of the Anadyr affords no decisive proof that they had passed round the Eastern extremity of Asia; for they might have penetrated to that river by land, from the Western side of Tschukotskoi-Noss.

In reviewing these several accounts of the Russian voyages in the Frozen Sea, as far as they relate to a North East passage, we may observe, that the cape which stretches to the North of the Piasida has never been doubled; and that the existence of a passage round Tschukotskoi Noss rests upon the single authority of Deshneff. Admitting however a practicable navigation round these two promontories, yet when we consider the difficulties and dangers which the Russians encountered in those parts of the Frozen Sea which they have unquestionably sailed through; how much time they employed in making an inconsiderable progress, and how often their attempts were unsuccessful: when we reflect at the same time, that these voyages can only be performed in the midst of a short summer, and even then only when particular winds drive the ice into the sea, and leave the shores less obstructed; we shall reasonably conclude, that a navigation, pursued along the coasts in the Frozen Ocean, would probably be useless for commercial purposes.

A navigation therefore in the Frozen Ocean, calculated to answer any end of general utility, must (if possible) be made in an higher latitude, at some distance from the shores of Nova Zemla and Siberia. And should we even grant the possibility of sailing N. E. and East of Nova Zemla, without meeting with any insurmountable obstacles from land or ice; yet the final completion of a N. E. voyage must depend upon the existence of a free passage[180] between the coast of the Tschutski and the continent of America. But such disquisitions as these do not fall under the intention of this work, which is meant to state and examine facts, not to lay down an hypothesis, or to make theoretical enquiries[181].

APPENDIX II.
Tartarian rhubarb brought to Kiachta by the Bucharian Merchants—Method of examining and purchasing the roots—Different species of rheum which yield the finest rhubarb—Price of rhubarb in Russia—Exportation—Superiority of the Tartarian over the Indian rhubarb.

Europe is supplied with rhubarb from Russia and the East Indies. The former is generally known by the name of Turkey rhubarb, because we used to import it from the Levant in our commerce with the Turks, who procured it through Persia from the Bucharians. And it still retains its original name, although instead of being carried, as before, to Constantinople, it is now brought to Kiachta by the Bucharian merchants, and there disposed of to the Russians. This appellation is indeed the most general; but it is mentioned occasionally by several authors, under the different denominations of Russian, Tartarian, Bucharian, and Thibet, Rhubarb. This sort is exported from Russia in large roundish pieces, freed from the bark, with an hole through the middle: they are externally of a yellow colour, and when cut appear variagated with lively reddish streaks.

The other sort is called by the Druggists Indian Rhubarb; and is procured from Canton in longer, harder, heavier, more compact pieces, than the former; it is more astringent, and has somewhat less of an aromatic flavour; but, on account of its cheapness, is more generally used than the Tartarian or Turkey Rhubarb.

The government of Russia has reserved to itself the exclusive privilege of purchasing rhubarb; it is brought to Kiachta by some Bucharian merchants, who have entered into a contract to supply the crown with that drug in exchange for furs. These merchants come from the town of Selin, which lies South Westward of the Koko-Nor, or Blue Lake toward Thibet. Selin, and all the towns of Little Bucharia; viz. Kashkar, Yerken, Atrar, &c. are subject to China.

The best rhubarb purchased at Kiachta is produced upon a chain of rocks, which are very high, and for the most part destitute of wood: they lie North of Selin, and stretch as far as the Koko-Nor. The good roots are distinguished by large and thick stems. The Tanguts, who are employed in digging up the roots, enter upon that business in April or May. As fast as they take them out of the earth, they cleanse them from the soil, and hang them upon the neighbouring trees to dry, where they remain until a sufficient quantity is procured: after which they are delivered to the Bucharian merchants. The roots are wrapped up in woollen sacks, carefully preserved from the least humidity; and are in this manner transported to Kiachta upon camels.

The exportation of the best rhubarb is prohibited by the Chinese, under the severest penalties. It is procured however in sufficient quantities, sometimes by clandestinely mixing it with inferior roots, and sometimes by means of a contraband trade. The College of Commerce at Petersburg is solely empowered to receive this drug, and appoints agents at Kiachta for that purpose. Much care is taken in the choice; for it is examined, in the presence of the Bucharian merchants, by an apothecary commissioned by government, and resident at Kiachta. |Care taken in examining the roots at Kiachta.| All the worm-eaten roots are rejected; the remainder are bored through, in order to ascertain their soundness; and all the parts which appear in the least damaged or decayed are cut away. By these means even the best roots are diminished a sixth part; and the refuse is burnt, in order to prevent its being brought another year[182].

Linnæus has distinguished the different species of rhubarb by the names Rheum Palmatum, R. Rhaphonticum,[183] R. Rhabarbarum, R. Compactum, and R. Ribes.

Botanists have long differed in their opinions, which of these several species is the true rhubarb; and that question does not appear to be as yet satisfactorily cleared up. |Rheum Palmatum.| However, according to the notion which is most generally received, it is supposed to be the Rheum[184] Palmatum; the seeds of which were originally procured from a Bucharian merchant, and distributed to the principal botanists of Europe. Hence this plant has been cultivated with great success; and is now very common in all our botanical gardens. The learned doctor[185]Hope, professor of medicine and botany in the university of Edinburgh, having made trials of the powder of this root, in the same doses in which the foreign rhubarb is given, found no difference in its effects; and from thence conclusions have been drawn with great appearance of probability, that this is the plant which produces the true rhubarb. But this inference does not appear to be absolutely conclusive; for the same trials have been repeated, and with similar success, upon the roots of the R. Rhaponticum and R. Rhabarbarum.

The leaves of the R. Rhaponticum are round, and sometimes broader than they are long. This species is found abundantly in the loamy and dry deserts between the Volga and the Yaik[186], towards the Caspian Sea. It was probably from this sort that the name Rha, which is the Tartarian appellation of the river Volga, was first applied by the Arabian physicians to the several species of rheum. The roots however which grow in these warm plains are rather too astringent; and therefore ought not to be used in cases where opening medicines are required. The Calmucs call it Badshona, or a stomachic. The young shoots of this plant, which appear in March or April, are deemed a good antiscorbutic; and are used as such by the Russians. The R. Rhaponticum is not to be found to the West of the Volga. The seeds of this species produced at Petersburg plants of a much greater size than the wild ones: the leaves were large, and of a roundish cordated figure.

The R. Rhabarbarum grows in the crevices of bare rocky mountains, and also upon gravelly soils: it is more particularly found in the high vallies of the romantic country situated beyond Lake Baikal. Its buds do not shoot before the end of April; and it continues in flower during the whole month of May. The stalks of the leaves are eaten raw by the Tartars: they produce upon most persons, who are unaccustomed to them, a kind of sphasmodic contraction of the throat, which goes off in a few hours; it returns however at every meal, until they become habituated to this kind of diet. The Russians make use of the leaves in their hodge-podge: accordingly, soups of this sort affect strangers in the manner above mentioned. In Siberia the stalk is sometimes preserved as a sweet-meat; and a custom prevails among the Germans of introducing at their tables the buds of this plant, as well as of the Rheum Palmatum, instead of cauli-flower.

The R. Rhaponticum which commonly grows near the torrents has, as well as the R. Rhabarbarum of Siberia, the upper part of its roots commonly rotten, from too much moisture: accordingly, a very small portion of the lower extremity is fit for use. The Russian College of Physicians order, for the use of their military hospitals, large quantities of these roots to be dug up in Siberia, which are prescribed under the name of rhapontic. But the persons employed in digging and preparing it are so ill instructed for that purpose, that its best juices are frequently lost. These roots ought to be drawn up in spring, soon after the melting of the snows, when the plant retains all its sap and strength; whereas they are not taken out of the ground before August, when they are wasted by the increase of the stem, and the expansion of the leaves. Add to this, that the roots are no sooner taken up, than they are immediately sliced in small pieces, and thus dried: by which means the medicinal qualities are sensibly impaired.

For the same roots, which in this instance were of such little efficacy, when dried with proper precaution, have been found to yield a very excellent rhubarb. The process observed for this purpose, by the ingenious Mr. Pallas, was as follows: The roots, immediately after being drawn out, were suspended over a stove, where being gradually dried, they were cleansed from the earth: by these means, although they were actually taken up in autumn, they so nearly resembled the best Tartarian rhubarb in colour, texture, and purgative qualities, that they answered, in every respect, the same medicinal purposes.

A German apothecary, named Zuchert, made similar trials with the same success, both on the Rheum Rhabarbarum and R. Rhaponticum, which grow in great perfection on the mountains in the neighbourhood of Nershinsk. |Plantation of Rhubarb in Siberia.| He formed plantations of these herbs on the declivity of a rock[187], covered with one foot of good mould, mixed with an equal quantity of sand and gravel. If the summer proved dry, the plants were left in the ground; but if the season was rainy, after drawing out the roots he left them for some days in the shade to dry, and then replanted them. By this method of cultivation he produced in seven or eight years very large and sound roots, which the rock had prevented from penetrating too deep; and when they were properly dried, one scruple was as efficacious as half a drachm of Tartarian rhubarb.

From the foregoing observations it follows, that there are other plants, besides the Rheum Palmatum, the roots whereof have been found to be similar both in their appearance and effects, to what is called the best rhubarb. And indeed, upon enquiries made at Kiachta concerning the form and leaves of the plant which produces that drug, it seems not to be the R. Palmatum, but a species with roundish scolloped leaves, and most probably the R. Rhaponticum: for Mr. Pallas, when he was at Kiachta, applied for information to a Bucharian merchant of Selin-Chotton, who now supplies the crown with rhubarb; and his description of that plant answered to the figure of the Rheum Rhaponticum. The truth of this description was still further confirmed by some Mongol travellers who had been in the neighbourhood of the Koko-Nor and Thibet; and had observed the rhubarb growing wild upon those mountains.

The experiments also made by Zuchert and others, upon the roots of the R. Rhabarbarum and R. Rhaponticum, sufficiently prove, that this valuable drug was procured from those roots in great perfection. the seeds of the Rheum Palmatum were received from the father of the above-mentioned Bucharian merchant as taken from the plant which furnishes the true rhubarb, we have reason to conjecture, that these three species, viz. R. Palmatum, R. Rhaponticum, and R. Rhabarbarum, when found in a dryer and milder alpine climate, and in proper situations, are indiscriminately drawn up; whenever the size of the plant seems to promise a fine root. And perhaps the remarkable difference of the rhubarb, imported to Kiachta, is occasioned by this indiscriminate method of collecting them. Most certain it is, that these plants grow wild upon the mountains, without the least cultivation; and those are esteemed the best which are found near the Koko-Nor, and about the sources of the river Koango.

Formerly the exportation of rhubarb was confined to the crown of Russia; and no persons but those employed by government were allowed the permission of sending it to foreign countries; this monopoly however has been taken off by the present empress, and the free exportation of it from St. Petersburg granted to all persons upon paying the duty. It is sold in the first instance by the College of Commerce for the profit of the Sovereign; and is preserved in their magazines at St. Petersburg. The current price is settled every year by the College of Commerce.

It is received from the Bucharian merchants at Kiachta in exchange for furs; and the prime cost is rated at 16 roubles per pood. By adding the pay of the commissioners who purchase it, and of the apothecary who examines it, and allowing for other necessary expences, the value of a pood at Kiachta amounts to 25 roubles; add to this the carriage from the frontiers to St. Petersburg, and it is calculated that the price of a pood stands the crown at 30 roubles. The largest exportation of rhubarb ever known from Russia, was made in the year 1765, when 1350 pood were exported, at 65 roubles per pood.

EXPORTATION of RHUBARB
From St. Petersburg.

In 1778, 1055 poods were brought by the Bucharian merchants to Kiachta; of which 680 poods 19 pounds were selected. The interior consumption of the whole empire of Russia for 1777 amounted to only 6 poods 5 pounds[189].

The superiority of this Tartarian Rhubarb, over that procured from Canton, arises probably from the following circumstances.

1. The Southern parts of China are not so proper for the growth of this plant, as the mountains of Little Bucharia.

2. There is not so exact an examination made in receiving it from the Chinese at Canton, as from the Bucharians at Kiachta. For the merchants, who purchase this drug at Canton, are obliged to accept it in the gross, without separating the bad roots, and cutting away the decayed parts, as is done at Kiachta.

3. It is also probable, that the long transport of this drug by sea is detrimental to it, from the humidity which it must necessarily contract during so long a voyage.

TABLE of LONGITUDE and LATITUDE.

For the convenience of the Reader, the following Table exhibits in one point of view the longitude and latitude of the principal places mentioned in this performance. Their longitudes are estimated from the first meridian of the Isle of Fero, and from that of the Royal Observatory at Greenwich. The longitude of Greenwich from Fero is computed at 17° 34´ 45´´. The longitude of the places marked * has been taken from astronomical observations.