Geology. 221 
ery striking manner, and we earnestly hope that his excellent example 
_ may be followed in other branches of science. Meantime we will permit 
_ ourselves to beg that the faithful laborer in the cause of science and the 
liberal publisher to whom we owe this volume will still further add to the 
re water, twig oo weg alle ai ee A 
Neutral sulphate of potash, © - ‘ Ke eg e 
Proto-sulphate of iron, - é - - - gM 
Double sulphate of ammonia and iron, - casita 
To this solution add two drops of ammonia, two ounces of acetic acid, 
hol sufficient to make it flow evenly over the plate. 
II. GEOLOGY. 
‘4nd with the more recent ones of Professor Cook, according to all of 
ecrac Sheiss and crystalline limestone of Orange county and of New 
tric unconformably the Lower Silurian strata. 
2 ot cota area wt Oe ree 
nd ne On; at any time, but has always maintain : 
proved, thirty yoke ago, what he pibliebed on page 43, (Chap. 2,) of 
Jour. Sct.—Secoxn Senres, Vor. XXXIX, No. 116—Mancu, 1865, 
29 / 
