266 Translations and abstracts from the French. 
The author sac that agreeably to this wat method, he 
placed a Reaumur’s thermometer in a glass vessel full of 
fresh water, one ors and a half high and an eat in ae 
ter, so that the ball was about a line from the botto On 
exposing it to a cold atmosphere, the intervals of sla 
were as follows, 
Temperature. Intervals of time. 
+6.6 - - - - - - 50" 
ess | - - - - - > 55 
5.0 - - - - - - 50 
5.0 - - - - Pe 50 
4.5 = . - - . - 65 
4.0 - : - - - - 198 
b, - - - - - - 60 
Sea - - - - - - 70 
The eee of a maximum density is abundantly mani- 
fest in this: experiment. The sudden retardation of coolin 
between 4° and 3° would be inexplicable oan a previous 
knowledge of the anomalous dilatation of w ; 
But in salt water the effect is different. The resale of the 
several series of experiments is 
1. That salt water, specific gravity 1.027, has no maxi- 
mum density while it remains liquid ; and even when ice has 
begun to form, the part which remains fluid, increases con- 
stantly and considerably in density. 
2. Salt water at 1.020 attains no maximum density ; or at 
least none while it is sensibly distant from the freezing tem- 
aoe 1295; 
3. Salt water at 1.010 acquires a maximum density, but 
at a temperature inferior to that of the greatest quantity of 
fresh water, viz. +- 19.5. 
It thus appears that a mixture of marine salt lowers the 
maximum temperature, and, mm proportion to its orohebls 
metallic mixture of Rose, ‘would probably be met with in 
other bodies, if their changes of volumes in the vicinity of 
ee point were carefully examined.—Bib. Univ. Oct. 
