Miscellanies. 367 
The name of Boué is a sufficient guaranty that the work will be 
conducted with ability. 
19. L’ Institut, Journal Général des sociétés et travaux. scien- 
tifiques de la France et de L’ Etrangere.—Nos. 95 to 102 except 
98. This is a scientific news bulletin and must prove very useful. 
20. Adhesive power of the cement of the Castle Rock. 
Quebec, March, 1835. 
To. Prof. Sirtiman, Sir—To determine its comparative adhesive 
powers, three pairs of fire bricks having iron rings rivetted into them 
to allow of the suspension of weights, were cemented together two 
and two on the 19th November last with three varieties of cement, 
each cement being mixed with 4 sand and 4 dry lime. These 
bricks were placed from the period they were set until the 24th 
eb. 1835, in a cold room where the temperature was often many 
degrees below the freezing point, after which they took the following 
weights to separate them, viz. 
Place of manufacture. Separating weights. 
Hull on the Ottawa, U.C. 4 ewt. 
Harwich, E Bans x eee 
Quebec - 10 “ Inthis experiment the hook of 
the balance ie with 94 cwt. and the bricks falling among the 
weights were taken up and afterwards bore the 10 ewt. 
While on the subject of cement, I may observe that in the peru- 
sal of the “‘ chemical and external characters of the lower strata at 
the Trenton Falls given at page 196 of vol. I. part 1 of the Lyceum 
of Natural History of New York,” I was struck with its apparent 
agreement as regards constituents with our black rock, and was also 
in consequence induced to ask if it be a hydraulic limestone ? 
The geological characters of the two rocks are certainly very dif- 
ferent not only as regards the inclination of the strata which is here 
great, but also with respect to the occurrence of fossils in them, 
these as you well know affording none if we except small seams of 
anthracite, certain anthracitic investments and a bituminous gum or 
oil, And the fact of the great profusion of organic remains “ con- 
tained in every part of the rocks,” as stated by Prof. Renwick, 
leads me to the opinion, notwithstanding the presence of the Caly- 
mene Blumenbachii, that the formation at Trenton Falls is the Car- 
boniferous limestone of Phillips or upper transition limestone of 
