394 Intelligence and Miscelianies. 
a test solution of indigo, and secondly, es a test of dilu- 
t 
asses. go. Molasses. 
Biood calcined with potash, - - 50 20 
Blood calcined with chalk, - 18 11 
Blood calcined with phosphate of lime, 12 10 
Gelatine calcined with potash,  - 36 15.5 
Albumen calcined with staal - 34 15.5 
Fecula calcined with potash, - - 10.6 8.8 
Charcoal of acetate of potash, - 5.6 4.4 
Charcoal obtained by the aascmnnanen of 
sub-carbonate of soda by Phonpharity: 1Qiisr Go BB 
aepblacls calcined, - 4 3.3 
do. calcined with potash, = - AB 10.6 
Charcoal of bones einieions wun: anaes 
acid and ‘ 20. 
Charcoal of 1 witl iati id, 1.87 1.6 
Vegetable or toed ol calcined wile phos: 
ate of lime, - 9. 1.9 
Charcoal of eA - - 1. le 
Idem. 
0: Monufabtory of diamonds.—Several accounts of 34 
eqannaation of pure carbon by artificial means an 
consequent formation of diamonds possessing the erica 
transparency and refractive power of that most valuable o' 
all the gems, have been published in the shite and have 
attracted public attention. But on the 24th of Nov. last 
M. Thenard stated to the academy of sciences, that in con- 
junction with Dumas and Cagniard de la Tour, he had care- 
fully analysed these crystals, and had aicenitied that they 
were only silicates and not artificial diamond.—Ann, de - 
Chim. Nov. 1828. 
51. Leeches.—In a journal entitled he Westphalian Indi- 
cator, a physician states a case in which leeches that had 
been employed on a person affected with syphilis, were af- 
terwards used on a child and communicated to the infant 
the same disease. Hence, when leeches are used a secon 
Saat care should be taken with respect to the nature of the 
of the person on whom they are at first employed.*— 
Fer. “Bul. Jan.. 1828. 
aa = ~ * Dr. Salle tainbleu, proposes as a means of economising leeches, to 
eut them in bet while t in = act of suction. The animal, en ahty ts 
continues to 
ting on the adhering part sane salt or tobacco. 
