402 Scientific Intelligence. 
ing observed it in a sample of impure ytterbia which he had 
received from the latter some months ago. He inclined to the 
b LFRED LLEN, F.C.S., h 
Sheffield School of Medicine, etc. VolumeI. Philadelphia, 1879. 
— & Blackiston.)—In preparing this book, Mr. Allen has 
oO 
ed eir commercial utilization. Exe however, in th 
oirs where they were described, the properties and 
reactions of many of these compounds have remaine i 
el own, and hence their adulteration has been an easy 
» mode of : 
and chemical properties, reactions, and adulterations, being dis- 
; is portion of the work appears to be entirely 
reliable, and leads us to hope that the second volume may soon 
be forthcoming. In reproducing it here, the American publishers 
have strengthened the cause of sanitary chemistry in this country. 
G. F. B. 
i. Laboratory Teaching: or Progressive Exercises in Practical 
Chemistry ; by Cuartes Lonpon zal Professor of Chem- 
istry in King’s College, London, ete. Fourth Edition, with 
eighty-nine ilk Bla- 
