Ford — Primordial Fossils from Rtnsselaer County, K Y. 



water on phosphorus perchlonde, than 



formation if its formula were 



CI 

 P-O-Cl. 



-'0 = C1-P=0+2HC1. 



of two chlorine a 



T 



molecule. But, if the formula P-O-Cl is correct, then it 



di 



is plain that the reaction with water is much more complicated. 

 So too the formation of the oxychloride from the trichloride 



assumption that the reaction consists simply in the taking up of 

 an atom of oxygen, without any accompanying displacement 

 and subsequent binding of chlorine. 



In regard to the experiments of Thorpe, it may be said that, 

 if Kopp's principle is correct, i. e,, if the specific volume of an 

 atom is determined by the manner in which it is held in com- 

 bination, and, if Thorpe's numbers are correct, then there can 

 be no doubt that the conclusion drawn by him is also correct. 

 While there is no reason for doubting 



numbers obtained by Thorpe, we may perhaps be ji 



^^* „„ — .: — -i^_„„i =---ple as so firmly establishe 



; proving the correctness 



iting Kopp's principle as so firmly established, that we 

 >y it as a means of proving the correctness or incor- 

 f formulas which seem to be well established by other 



means. 

 March, 1 



Art. XLV. — On additional species of Fossils from the Primor 

 dial of Troy and Lansinghurgh, Rensselaer County, N. Y. ; by 

 S. W. Ford. 



In a paper communicated to this Journal about a year ago 

 (March, 1875) I gave a short account of the Primordial rocks in 

 the neighborhood of Lansingburgh, N. Y., and of the finding 

 of several species of fossils in a deposit of conglomerate lime- 



