Geology and Natural History. 



with the North American Platemus occiden tails, var. ace 

 lia. Liquidambar Europmm, a Miocene species without re I: 

 now in the European flora, in that of our 



tinent; in the ■.. a> the group of Maximiein 



Persea Carolinensis ; in the Mayi* <>!«', a spirits similar to 

 American Jf. yn/jidi/olia ; and still more, one Lyrhnh-ndn. 

 Till* represented now by our T. pul>es<'ens, and an //>.>• rel 

 to I. Cassine. Thus, nine species of this group of thirty 

 Pliocene European species belong by identity or close affinit 

 the present North American flora, while ten only arc hump 

 the others being related by nine species to the flora of the C 

 ry I>i:md> and by tour to Asiatic types. 



est for the paleontology of this continent, where only, after > 

 mieux, material pertaining to a plioeene vegetation have 

 obtained; first from the Chalk I'duns of the Mississippi, below 

 mouth of the Ohio, and later and more abundantly from idie i 

 bearing gravel beds of Nevada County, California. From 

 last formation fifty species are known, and ten from the fori 



number six are already represented in the Lignitie flora oi 



cene of Maxiniieux, Phit>n ■■■-. L'»p>'-<l'<n>l»'i\ I'< /'*<-", 3I'»ji« 

 ZyrhKhndron, etc., are all already present in the American : 

 cene as in that of Europe, and. therefore have not come to us 

 migration. This subject, however, of transformation and mi 

 tion of vegetable types is examined with some more details 

 memoir on the Pliocene flora of California, now in the w:n 

 publication as a new volume on the Geology of California, 

 Professor J. D. Whitney. It is, therefore, more appropriate 

 postpone a consideration of it for the present. 



s. Prdimhmni X»te on the I),r,lopno,d of Orymusn,, 

 Oripnnc r,,j\. sinus ; !•} •'■ iin Tvm-mi. M ; >. heceiyed .1; 

 ary 18, 1877. — I beg leave to submit t<» ihe Royal >- ■< ;ety a ! 

 preliminary note of the n- further proflecul 



of my researches "On the Optical Ik-p.-rtm >nt of the Atmosph 

 with reference to Putrefaction and Infection." 



The very remark , . - \p. rim. nr* ■ f \>v lo>>erts, ofilanc 

 ter, which have been coni Conn, of lires 



In some cases j somplctely rt« 



ized by boiling for five --they na\e w 



stood the boiling temperature for a tar longer period 



Pursuing wi >iod of experiu: 



,i . , „ i,, ; ..a. din .it followed by Professor Cc 



[ Lv, e f^i i"iy an eiiomi"U* n~i>Ta 



iuous example will serve as 



