









/. Carey on C henopodiacem about the City of New York. 167 



then by the fishtail j and, lastly, by the jet, which is the least 

 economical ; and, consequently, lighting by gas is comparatively, 

 for equal amount of light, by far most expensive to those having 

 recourse to this mode of burning it, such as to those requiring 

 small quantities. The light, as then stated, was in the ratio of 

 100, 140, 160, 180. In the trials now recorded, the results do 

 not all correspond with these. With the small fishtail and the 

 Argand they do so very nearly ; the burners used having been 

 the same as formerly. The others, such as the large fishtail, not 

 formerly tried, is more economical than the small fishtail ; the small 

 batwing, also not formerly tried, is not more economical than 

 the small fishtail, and much less so than the large fishtail. The 

 large batwing, the largest I have ever seen, is equally economical 

 with the Argand : I found it very liable to smoke. The general 

 results of these trials may, however, be said to correspond with 



those previously given, proving the accuracy of my former state- 



inent, that the jet is the worst kind of burner, giving least light 



for the same consumption; next come the fishtails, generally 



speaking; then the bat wings of medium size; and, lastly, the 

 Argand. 



Art. XII.— Notes 



if New York 



My attention having been directed, during the past autumn, to 

 the Chenopodiaceous plants of this vicinity, I was surprised to 

 find, growing in considerable abundance about the waste lots in 

 the first and second avenues of the city of New York, (near 14th 

 street), a plant, which, though differing in some slight particulars, 

 I cannot doubt, is the Roubicva multifida, Moq.-Tand. (Chenopo- 

 dmm multifidum, Linn n Atriplex multifida, Crantz, C. Payco, 

 Molin. ChiLj Ambrina pinnatisecta, Spach, Veg. Phan.) This 

 synonymy I derive from the elaborate C henopodearv m Mono- 

 graphica Enumeration of Moquin-Tandon, where I find the spe- 

 Cles referred to South America, and the Cape of Good Hope. I 

 ar n not aware that it has hitherto been noticed in any of our Flo- 

 ras, as occurring in the United 'States, nor have I ever seen a spe- 

 cimen ; with the exception of a small piece in the herbarium of my 

 friend Professor Torrey, which he appears to have received, with- 

 out a name, from "Virginia, Dr. Aikin, 1843." Feeling some 

 interest in this discovery, I have been led to examine the charac- 

 ters of the genus Roubieva, founded on this single species, as 

 c °ntrasted with the subsequently published Ambrina of Spach, 

 w ho proposed to comprehend the Chenopodinm multifidum, L., 

 w ithin its limits ; being ignorant, no doubt, of the prior genus 





