Analyses of Books. 
1883.] 
559 
at as he once was, and as he still is in some parts of “ this our 
highly favoured country.” 
It comprises a valuable monograph of the scale-inseCts, — 
pests which are now being transmitted from one country to 
another, and which, even where the climate is uncongenial, make 
themselves at home in conservatories. 
From this Report we may learn how easy it is for insects to 
change their diet, and thus suddenly rank as enemies to the 
husbandman. 
Another reflection, not to be overlooked by Zoophilists, Neo- 
Buddhists, and the like, is the impossibility of existing without 
taking life. If we eschew all animal food we must still destroy 
animals by myriads, or no vegetable nutriment will be left for us 
to consume. 
Memoirs of the Geological Survey of India . Vol. XIX., Part 1. 
Calcutta : Geological Survey Office, London : Trubner 
and Co. 
This part is an account of the Cochar earthquake of January 10th, 
1869, by the late Dr. T. Oldham, F.R.S. At the time of the 
occurrence he was at Barrackpore, about 15 miles from Calcutta, 
but, according to the instructions of the Lieutenant-Governor, he 
went to Cachar and Silchar to observe the results of the shock 
at its centre. It appears that six or eight shocks had occurred 
in 1866, chiefly between January and April, whilst none are re- 
corded in 1867 and 1868. It is remarked that in the Silchar 
cemetery the upper slab of a tomb, a heavy mass of marble, had 
been projected from the body of the tomb more than 8 feet in a 
north-north-easterly direction. 
At Sylhet, according to the Executive Engineer, a peculiar 
tremulous, “ almost stinging,” sensation was experienced in the 
feet. At Manipur it was noted that, though the shock lasted 
about a minute and a half, the lower animals did not seem at all 
affeCted. 
Passing over numerous details of the effeCts of the shocks in 
different places, we come to generalities. 
It is concluded that the shock originated in a fissure about 
20 miles long, on the northern margins of the Jaintra Hills. 
The mean depth of the focus is calculated at 30 to 35 miles, and 
the velocity of motion of the wave particles as high as 30 feet 
per second. This being double that observed by Mr. Mallet in 
the great Neapolitan earthquake of 1857, the question arises why 
the loss of life and destruction of houses was so much smaller 
in India than in Italy ? The cause must be sought in the 
