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POPULAR SCIENCE REVIEW. 
at Beckton, 26 98 grains per 100 cubic feet ; at Cannon Street 25*77, grains; 
at Friendly place, Mile End, 8*71 grains ; at Arundel Street, Haymarket, 
18*89 grains; and at Millbank Street, Westminster, 26*96 grains; while 
that of the Imperial Company has been 32*98 grains at Oakley Square, 
Chelsea ; 28*16 grains at Camden Street, Camden Town ; and 25*71 grains 
at Graham Street, Dalston. The average amount of sulphur in the South 
Metropolitan gas wa3 36*05 grains per 100 cubic feet. It is a noticeable 
fact that the quantity of sulphur in the gas of the Chartered Company at 
Friendly Place has only once contained as much as 20 grains per 100 feet ; 
and that during the last month the gas at Beckton, at Cannon Street, at 
Friendly Place, and at Arundel Street, has never contained 20 grains per 
100 feet; the average for the month having been from 4*63 grains at 
Friendly Place to 13*64 grains at Beckton. Dr. Letheby regards this as 
highly satisfactory. The proportion of ammonia in the gas has not at any 
time or place exceeded the quantity (2*5 grains per 100 cubic feet) pre- 
scribed by the referees ; the average amount being from nil to 1*28 grains 
per 100 feet. — The Chemical News, July 19. 
GEOLOGY AND PALAEONTOLOGY. 
The Palceontographical Society Volume for 1871, which has only been a 
few months issued, contains the following important monographs : — 1. “The 
Flora of the Carboniferous Strata.” Part III. By E. W. Binney, F.R.S., 
F.G.S. Pp. 63-96. PL xiii.-xviii. 2. “ The Fossil Merostomata.” Part 
III. By Henry Woodward, F.G.S., &c. Pp. 71-120. PI. xvi.-xx. 
3. “Supplement to the Crag Mollusca.” Parti. By Searles Y. Wood, 
F.G.S. Pp. 1-90. PI. i.-vii. Together with an “ Introductory Outline of 
the Geology of the same District,” with a Map, by S. Y. Wood, jun., F.G.S., 
and F. W. Harmer, F.G.S., pp. i.-xxxi. 4. “ Supplement to the Reptilia 
of the Wealden.” Part IV. By Prof. Owen, F.R.S. Pp. 1-15. 
PI. i.-iii. 5. “ The Pleistocene Mammalia.” Part IV. By W. Boyd- 
Dawkins, M.A., F.R.S., &c., and W. Ayshford Sanford, F.G.S. Pp. 177- 
194. PI. xxiv. and xxv. 6. “The Pleistocene Mammalia.” Part Y. 
By W. Boyd-Dawkins. M.A., F.G.S., &c. Pp. 1-30. PI. i.-v. 
Geology at the British Association. — The Geological Section began its sit- 
tings with the Sixth Report on Fossil Crustacea, by Mr. II. Woodward, F.G.S., 
in which various newly-discovered species from the silurian, carboniferous, 
tertiary, and other rocks were minutely described. The next paper w r as of 
great importance, by the Rev. J. Gunn, on the Prospect of Finding Pro- 
ductive Coal Measures in Norfolk and Suffolk, with suggestions as to the 
places best adapted for experimental borings. The next paper was on the 
Genera Trimerella, Dinobolus, and Monomeralla, by Thos. Davidson, F.R.S., 
and Professor King. Mr. John Gunn read a paper on the possibility of 
finding Coal in Norfolk and Suffolk, with suggestions for an experimental 
boring. Hunstanton was recommended as the most likely spot where coal 
would be soonest reached. Professor Hull thought that if there were any 
places where the chances of finding coal were mV, it was in the eastern 
