370 E. Billings on the claim of Priority in the determination 
The Sarthe is a little in excess because with the small 
ntity of material at command, it was impossible to wash out 
e nok entirely “nol bI6 precipitate thoroughly, without too 
great a loss 
Chloro-palladite of Methylamine. 
methylamine is added, not in excess, to an acid solu- 
tion of protochlorid of palladium, or when the eee nee salt is 
treated with an excess of the same acid solution, a deep brown 
ae liquid is obtained, which by concentration yields bea beautiful — 
wn red lamina, very soluble in water and in alcohol. The 
cuany at command was insufficient for analysis, but judging 
from analogy, their constitution must be 
C,H,NCl, PdCl. 
Picrate of Methylamine. 
~ This is a very beautiful salt. It crystallizes in bright, 
laminz grouped in fine arborescent clusters, or by som 
slower crys stallization, in amber-colored bevelled prism 
ir Se plates. Heated on platinum foil it deepens in ¢¢ 
elts to a clear red liquid apparently without er 
ant when the heat is further raised, burns with a v1  —— 
light leaving a carbonaceous residue, It is rnoderstalll solu 
in water and in alcohol. 
Other _combinations of methylamine will be described at  — 
future ti 
ee 
Arr. XXXVIL—On Prof. J. Hall's ae i hee Priority in the wil 
* eat Rl of the Age of the Red Sandrock Series of Vermont; PY 
In an article published in the last January number ot aD 
Journal (this vol., p. 107) Prof, Hall states that in 1844 an iain 
he made several sections from the Hudson river and Champ i. 
valleys eastward, and that he then recognized the Potsdam re 
stone at several localities both in Vermont and Massachuse 
It is very true that he did; but his paper is so written, that wd 
of Ses coniidhiinibation i is to supply several facts not ord 
Sono Beret | Hall, and which if read in connection "3 yt | 
ae throw some additional light upon the subject. — 
all personal considerations, I hold that this inv j 
