Check-in by ben on 2025-08-06 16:38:55

  Add links to Hyde's Periodic Relationship of The Elements and
  also the spiral format in the Internet db of periodic tables.

  INSERTED    DELETED
        11          1 periodic.awk
        11          1 TOTAL over 1 changed file

Index: periodic.awk
==================================================================
--- periodic.awk
+++ periodic.awk
@@ -148,11 +148,11 @@
 function mkdir(dir) {
     system("mkdir -p \"" dir "\"")
     return
 }
 
-function print_about(    dir, f) {
+function print_about(    base, dir, f, url) {
     dir = outdir "/about"
     mkdir(dir)
     f = dir "/index.gph"
 
     print "# About Gopher Periodic Table of the Elements\n" >f
@@ -171,10 +171,20 @@
         "/details/atoms-periodic-table-for-dos|tilde.pink|70]" >>f
 
     print "[0|ASCII Periodic Table|"                   \
         "/users/amr66/b_scientific/periodic_table.txt" \
         "|gopher.srcf.net|70]" >>f
+
+    base = "https://www.meta-synthesis.com/webbook/35_pt/pt_database.php"
+
+    url = base "?PT_id=748"
+    print "[h|Hyde's Periodic Relationships of the Elements (web)|" \
+        "URL:" url "|tilde.pink|70]" >>f
+
+    url = base "?PT_id=167"
+    print "[h|Spiral Format Periodic Table (web)|" \
+        "URL:" url "|tilde.pink|70]" >>f
 
     close(f)
     return
 }