110 Scientific Intelligence. 
ployed contained traces substances—Ann, der Chemie und 
arm., CXxxviii, 
6 crotonic acid.— as given another instance of the conver 
sion of one organic acid into another by simple addition of one molecule 
t two atoms of hydrogen. When crotonic aci @,, is heated 
with f sodium or with metallic zine and dilute sulphuric 
acid, it passes gradually into — acid, €,H,O,, this last being in 
modification in which it is obtained by fermentation.— Ann. <- 
Chemie u. Pharm., exxxix, 64. 
7. On syntheses of a —A. W. Hormann has succeeded i in the 
€ 
synthesis of guanidin, N, { Hg, by two different processes. An alcoholi¢ 
solution of al en (N02 )Cl,, and ammonia is heated for some 
e in a closed tube to a temperature of 100°. Under these circum 
stances the reaction occurs which is represented by the equation 
€(N6O,)Cl,+3NH,=€H.N,, HCI+2HCI+HN®,. 
‘ When orthocarbonic ether is heated to 150° C. with aqueous ammonia, 
guanidin and alcohol are formed, oadiniy to the equation, 
€(C,H,),0,+3NH,+-H,0=€H,N,, H,0+4(€,H, HO). 
Ann. der arm., CXXXiX, 
8. On flame reactions — Bux w has made a ae study of “ihe 
action ot different parts of the, fae of the well known burner which 
wi 
Il. MINERALOGY AND GEOLOGY. 
1. Geological Survey of Illinois ; A. HL Worrnen, Director. pf 
I, Geology. xvi, and 504 pp. ro royal 8vo, with ma sections, dc. 1866, — 
Springfield. Published by authority - the Legislature of "Tlinois. ol . 
the September number of this Journal, we gave a brief notice of the 
issue of this valuable Report, it having reached us so near our publication 4 
stances beyond our control prevented the preparation of this notice it 
