68 Scientific Intelligence. 
ormer. But Wilm and Biel showed that these Russian oils had 
an illuminating power ten per cent higher than the American oils 
and Biel observed that these oils of higher gravity rose more eas- 
ily through the wicks. This removed the public “page isa it 
importation of American petroleum has almost ceas 
S now examined by the authors were prepared “ae irik aide 
tillation from the natural oil. After nine fractionings, usin 
American petroleum gives hexane of avy 0669. Pion 80° to 
85°, the gravity was 0°733; 85° to 90°, 0°741; 90° to 95°, 0°745; 
95° to 100°, 0°748; 100° to 105°, 0-752. American petroleum 
_ heptane between 95° ~ 100°, of gravity 0°699. Thinking 
are not omologues of ethylene, since : bromine does not act on 
them in the co hen warmed, demdedaation ensues but with 
evolution of HBr, proving substitution. Further study proved 
indifferent to chemical reagents. From the fraction 115° to 120 
containing hexahydroisoxylene, trinitroisoxylene was prepared 
identical with that from metaxylene. Heated on the water bath 
with fuming sulphuric acid, the hydrocarbon is sence and de- 
stroyed, yielding no eran acid. When the maine 90° to 95° is 
dissolve a a mixture one part nitric esi o parts ars 
phurie acid, CO, is seedily evolved and n hing “separates 
dilution ke ater. One part of the nat 95° to 100° boiled 
with four parts nitric acid of 1:38 until red vapors cease, gave aD 
acid Higa containing acetic acid, considerable succinic "acid and 
a large quantity of oily nonvolatile acids. e su pernatant oily 
layer gave on fractioning, a distillate between 101° to 103°, e& 
sentially hexahydrotoluene; and a second, 210° to 215°, having 
the formula C,H,,NO, either a nitro-product ve a nitrous other. a 
Ber, Berl. mire m. Ges., , 1818, October, 1880. G. 
pre sae rom Sequoia gigantea. * Lunes 
and Pt pt have published a preliminary note on certain 
products obtained from Sequoia gigantea Torr. Stems about 
three meters long, furnished by Frébel & Co., gardeners im 
