56 Scientific Intelligence. 
as “nitrites” (and as this mistake oceurs in several places it can 
hardly be a printer’s error) ; “ éant ramenée” (page ili) should be — 
rendered “reduced” and not “ “brought back,” as it is a question — 
der “ invertie.? « eh ” ete. by “ alter ” “altered,” etc., instead 
of the much more familiar “i invert, 1c inverted,” ete. It is prob 
ably also to the aie of the translator that we owe the terms 
bs potass, kd a hydrat ation,” “ dishydratation, ” “magnesium subear 
bee and “ marine salt.” 
We may pass over various misprints, mentioning one on ly, by 
which a paragraph headed in the original “ Gaz Lumiere” ap 
pears with the heading “ Gas-light” to the confusion of the reader. — 
We may, however, criticize the constant use of the French words, — 
with accents, to indicate the weights and measures of the metric — 
system, and also the giving in every case the equivalent in Eng: 
lish weights and measures (often to the third place of decimals) 
even where an approximate or relative number is mentioned. As 
a single instance, we read on page 111, “about 1 cub. centimétre — 
of oxygen (061 cub. in.) for each 10 "oud, cent. (-61 cub. in.) of 
the solution. 
It is most oe to be hoped that the promised volumes of 
urtz, H. SteClaire Deville, and Berthelot will not suffer such 
berger. As far as the reader is concerned, it is at — pres 
procure the works in the oni al tongues; and thus one th ks 
of the International Series fails to be fulfilled. .N. 
iquid Films.—Dr. Sonpuavss has extended the obser 
_ different liquids may be com in this t. = 
uss prefers the circular wi nd compares vi to 
size) the films of forty-six different liquids. One film = 
d ion, to which a little glycerine had a 
wor over oy a of mer aiaees S xiv, 37. 
8 
a center, the ratio of whose radii is the index of refraction. If the 
incident oy is a to meet the inner circle, and through the 
point of intersection a vertical line be drawn, the line drawn from 
