394 Scientific Intelligence. 
sist of sand or lime; this might have been concluded from the fact that 
calcite and quartz have almost the same specific heat, viz., 0°20 and (19. 
he more rich a soil in humus, the higher is its specific heat. Thus peat 
was found to have 0°507, and a soil, very rich in humus, from Kaiserstein, 
gave 0°4143. Since water also must increase the specific se ‘i a soil, 
we may conclude that loamy soils also have a high specific h 
0 great a variation in so important a physical property of Soils is of 
oi importance to agriculture. A plant sensitive to changes in 
temperature may be unable to grow on soils of low specific heat, how- 
ever Testes this soil] might be in other respects—Pogg. Ann., 1866, 
avs 102-135. 
lines. e same is true in pagina to the luminous glow observed when 
electricity i is discharged between two points. At the same time the latter 
oa is still much Bie chen that of the brush, It is characteristic 
gible rays are first extinguished strat air is gts more and more 
rarefied. Thus the brush and glow are due to the luminosity of nitrogen 
at a temperature below that at which oxygen mes luminous ; and 
furthermore they consist principally of the more — rays. —P tg 
Ann., 1866, exxix, 508-520; L’Jnstitut, 1867, p. 5 
II, MINERALOGY AND GEOLOGY. 
te on @ new genus of fossil Crustacea; by F. B. Meex.—In the 
1. Note y 
last number of this Journal, p. 257, I dientioaed having seen in “ The 
ler,” a notice of a paper by Mr. Henry Woodward, read befo re the 
to 
e body sepals anchylosed. The per = nett Woodward’s paper, 
the 
mentioned by me, was unaccompanied by figures or diagnosis, and no 
smc pest: were ~ — the fact that our var Illinois fossil has its 
y segments me d agrees very nearly in its genera appear- 
anee with gh the sie referred by En nglish authors to Belin 
led me to refer it to the new genus Prestwichia. Since that 
have seen Mr. Woodward’s sinferoatinig paper as published in the 
terly Journal of the Geological Society, vol. xxiii, No, 89, p. 28, W 
