886 



Analyses of Books, 



[Nov. 



From this table it appears that the occurrence of earthquakes in 

 the different seasons was as follows : — 



NORTH HEMISPHERE 



e three harvest i 

 „ winter 

 „ spring 

 „ summer 



In reference to the hours at which they took place during the 

 same period, we have the following data for earthquakes : — 



Earthquakes at Basle. — According to Professor Merian, the 

 earthquakes at Basle are correctly estimated as follow : — 



In the 11th century, 3 

 „ 14th „ 4 

 „ 15th „ 5 

 „ 16th „ 23 



In the 17th century, 59 

 „ 18th „ 24 

 ,. 19th „ 4 



118 occurred in the different months, as follows :- 



122 



The most severe earthquakes were on the 18th October 1356, 

 when 300 persons lost their lives; on the 2 1st July 14 16, 7th Sep- 

 tember 1601, and 17th November 1650. 



Compounds of Ferro-cyanodides and Ammonia , by Dr. Bunsen, 

 of Gottingen. 



1. Ammonia Ferro-cyanodide of Copper. — When a salt of copper 

 is precipitated by ammonia, and an excess of the latter added, so as 

 to re-dissolve the precipitate, if ferro-cyanodide of potassium be brought 

 in contact with the solution, a precipitate is not immediately pro- 



