T. N. Dale, Jr.—The Fault at Rondout. 293 
on the walls of the vessel which contains it, as has been op tee 
by eminent physicists in similar cases, we need not here discuss. 
If we reject these cases of nearly saturated vapor, as well as 
the three earlier determinations, there remain 25 experiments 
at pressures somewhat less than one atmosphere in which the 
maximum difference between the observed and calculated densi- 
ties is 05, and the average difference ‘016 ; nine experiments at 
pressures ranging from 29™™" to 7™™, in which the maximum 
difference is ‘07 and the average ‘035; and three experiments at 
ressures of about 8™, in which the average difference is ‘17. 
he extraordinary precision of the determinations at low pres- 
sures is doubtless dws to the large scale on which the experi- 
[To be continued.] 
Art. XXXVIII.—The Fault at Rondout ; by T. NELson 
DALE, Jr. 
"Ny, 
i 843. 
at. Hist. of N. Y., Part IV, Geology, by W. W. Mather. PI. 7, fig. 9, 1 
1 tage Study of the Rocks,” by Si Lindsley, in the forthcoming Part I, 
Vol. ii, of Proceedings of the Poughkeepsie Society of Natural Science. 
he OAR ae 
