ca) 
ounds to the equate. Stele from which it 
may negra? at the application of this 
substance aga cement is susceptible of 
improvement. 
_ Botany. —Description of the Grevillea- 
num erratum, . a new genus belonging to 
the order musci. Generic characters: seta 
terminal ; peristome double ; outer teeth 
16, broadish, acute ; inner 64, subhorizon- 
tal,. somes pent, free at the apex, 
Calyptra glabrous, opening laterally; base 
tubular, sheathing the neck of the capsule ; 
apex closed acute. This singular and dis- 
tinct genus is named in honour of Dr. Ro- 
bert K. Greville, of Edinburgh, author of 
the Flora Edinensis, and one of the most 
distinguished muscologists of the present 
day. It can be easily recognized by the 
characters above given. The numerous 
teeth of the inner peristome are always 
distinct at the base, but in the young state 
they cohere slightly at the apex, where they 
appear to be held together by transverse 
bars, which separate as the capsule becomes 
Mature. The calyptra is closed at the top, 
and has a short mucronate point. Its lon- 
gitudinal opening is scarcely more than one- 
third of its whole length, through which 
the capsule escapes while in a very young 
state. Its base forms a sheath, which 
closely embraces the neck of the capsule and 
summit of the seta. When, however, the 
capsule become sold,the calyptra,still sheath- 
ing the seta, falls down to the base of the 
latter, and there remains among the leaves. 
G... Serratum.—Stem erect, simple. 
Leayes_ linea-lanceolate, acute,  crisped 
when dry. Lid hemispheric, yellow, 
without a beak. Capsule cylindric, curyed, 
sub-horizontal. Teeth of the peristome 
yellow. Hab: rocks in shady places, a 
mile west of Troy. Stems about an inch and 
a half in height, simple, bearing a consider- 
able resemblance in habit to a Bartramia. 
Leaves numerous, nearly half an inch in 
length, crisped and rigid. Seéa dark chest- 
Bue brown and shining. Silliman’s Journal. 
Varieties. 
Fea 
American Coal,—Much attention \ havin 
been recently bestowed in’ America tipon't 
anthracite’ coal of Rhode’ Island, the! follow- 
ing particulars regarding it have been pub) 
lished by Professor Silliman :—"This “an 
thracite is ignited without difficulty.” The 
best’ method of (burning“it is\in'! the iron 
furnace or stove, lined with fire-bricks and 
unless previously dried, it burns swith ani 
abundant ‘and bright red ‘flame, “Lhe heat it 
produces is inténse and of long continuance. 
The gas emitted’ by it is light carbonated 
hydrogen, mixed of course with carbonic 
acid gas. And in general the Rhode Island 
anthracite, although dissimilar in appear- 
ance, is very similar in its effects to the 
anthracites of Pennsylvania. The colour of 
it is steel grey. | Its composition is as fol- 
lows :—100 grains contain from 90) to 94 
grains of carbon, the rest according to Dr. 
Meade being i iron and earth. 
100 grains contain, Carbon......90 
Water jay, 2K i. aA 
Oxides of iron and manganese: + 2. 50 
Doss. olive : 
2920'T A 
Peewee eeseeeeeeeeee 
—— 
100 
Tn another specimen Professor b-ony- ck 
em found 100 pera afforded— 
Carbon .. LI All HORM TTORIO! 
Water.. ant, a6 6.70 i 
Siliet!!.9 CBee ve tered benesseseesene 8.50 
Oxides of i iron and manganese.. 7:10 | 
alumine a trace’ 
100.— 
Professor Vanuxem found the composi- 
tion of the Lehigh anthracite was. 
Carbon....... scvaacdelecisss des attends SOM 
Wateriii.nk. agentes 66. 
Sibéx:s2. AGM. Yh Boe 
Alumina........ Hive 
Oxides of iron and manganese.. 0,2 
WOKS: suckedccvedevetespesssuetacency aoe 8 
100 
fe eweeoee 
Pe ee tween eee eeseroner . 
PROCEEDINGS OF LEARNED SOCIETIES. 
DOMESTIC. 
Astronomical Society of London.—Meet- 
ing in June,—The reading of the paper 
communicated by the Rey. Fearon. Fal- 
lows, astronomer at the Cape of Good 
Hope, on the small transit instrument, 
was concluded. There was read an appen- 
dix to a former paper on the latitude of the 
Royal Observatory, by, the Astronomer 
Royal. From 720 observations of the 
pole star made during the last 18 months, 
the co-latitude of the observatory is de- 
duced. 38° 31’ 21’: 045. Also.a summary 
of the observations made for, the determi- 
nation. of the latitude of the observatory. 
at, Wilna, by M. Slawinski. . From_ 260 
observations made in the months of Octo- 
ber and. November, 1825, the latitude re- 
ferred to the centre of the transit instru- 
ment is 54° 40’ 59”*09 deduced by compa- 
rison with, Bessel, and 54° 41! 07:05 by 
comparison, with the Nautical Almanac, 
The greatest. of these determinations - is 
less by about 2” than the latitude. of the 
same observatory as given by M. Slawin- 
ski’s predecessors, Poezobut and Sniadecki.. 
Also micrometrical observations of the 
planet Saturn,, made with Frauenhofer’s 
largerefractor at Dorpat, by Professor Struye, 
The same paper also details the results of 
micrometrical. measurements. of Jupiter 3 
and its satellites, made with the samé in ins 
struments. On the same piers 
count of some observations tt 
twenty feet reflecting bebeaisgeta 
Wy Herschel, pe Ras secr 
