imei lie, ae 
satanic inde cm ma i cia aA eaten 
ih i a 
Miscellaneous Intelligence. 330 
important ones existed early during Coal-Measure times. n 
page 282 are some conclusions respecting four of the coal-troughs ; 
chapter 21 treats of the structure of coal-beds and intervals be- 
tween coal-beds; shows that coal-beds divide; that in the great 
trough, the groups thin out east, north and west; also contains a 
briet discussion of the nature of clay veins, besides giving a few 
notes on the Paleontology of Southwest Pennsylvania and imper- 
fect lists of fossils observed. 
department of Anatomy and Physiology; in Geography, by Pro- 
fessor C. Wyville Thomson ; in Mechanical Science, by Mr. Edward 
aston. Lectures were delivered by Mr. Romano upon Animal 
Intelligence, and by Professor Dewar on Dissociation, or Modern 
Ideas of Chemical Action. A considerable number of papers were 
d 
shape of a thin plate. The size of the plate being determined 
within pretty narrow limits by acoustic requirements, the strength 
of the magnet which can be used is also limited. 
€ magnets which I use in the new form of telephone are 
shaped like a W; two U magnets with, say, their N. poles bolted 
