, a l« (eS <O 
* 4 
136 
‘*rayons continuateurs.” He explains the fact that photo- 
graphic negatives, exposed for a few seconds to chemical light, 
and then to the red and yellow part of the spectrum, are acted 
upon by these rays, by admitting that during the first exposure 
chloride of silver is reduced only to the state of sub-chloride, 
which in its turn is acted upon by yellow light, and thus reduced 
to the metallic state. This explanation appears the more 
probable, as iodide and bromide of silver do not exhibit the 
same property, iodine and bromine forming but one compound 
with silver.—Julius Thomsen reported on the amount of heat 
yielded by mixing nitric acid and water. The result of his ex- 
periments he sums up as follows :— A diluted nitric or sulphuric 
acid, when further diluted with the same quantity of water it 
already contains, will yield the smallest amount of heat, when 
the molecular heat of the acid is equal to that of the water 
which is contained in it— Henry Armstrong sent a summary of 
his researches on isomeric derivatives of phenole, most of which 
are familiar to the English public.—Heinrich Baumhauer pub- 
lished some remarks on the natural system of chemical elements, 
and the relations between atomic and specific weights.— 
F. Birlstein and A. Kullberg have found that a-dinitro-naphtha- 
line treated with a mixture of nitric and sulphuric acids yields a 
new y-trinitre-naphthaline fusing at 147°, while fuming nitric 
acid produces only the ordinary a-trinitro-naphthaline.—E. 
Mulder obtained a yellow solid combination by precipitating 
cyanamide with nitrate of silver. Its composition, CN,Ag», 
leads the author to suppose cyanamide to be constituted accord- 
ing to the formula C(NH), of carbodiimide.—R. Siemens sub- 
mitted sulfo-acetic acid to the action of perchloride of phosphorus 
in order to investigate the chloride thus obtained as well as its 
CHCl = SO,Cl 
reduction. To the former he gives the formula | 
Ccocl 
to the compound obtained from it by the action of tin and hydro- 
chloric acid, the formula of thio-glycollic acid : 
CH,. SH CH..§ 
| forming the lead-salt Gg’ Gg ¢ Pb. 
co.0OH g 
The chloride is decomposed by water into the body formerly 
described by Kolbe under the name of trichlor-methyl-sulfor- 
chloride, CC1,.SO CL. 
PARIS 
Academy of Sciences, June 2.—M. de Quatrefages, 
president, in the chair.—The president announced the death of 
M. de Verneuil, membre libre, which occurred at Paris, May 29. 
—M. de Chevreul communicated the principal results of his 
researches on avic acid, which will shortly be published. The 
president presented the first part of the work on the crania of the 
human race upon which he and Dr, Hamyare engaged.—The 
following papers were read :— Note accompanying the presenta- 
tion of a work on cellular anatomy and physiology, by M. Ch, 
Robin.—On the transit of Venus in 1882, by M. Puiseux.—Trial, 
during an eclipse of the sun, of the new spectroscopic method 
proposed for the observation of the next transit of Venus by 
Father Secchi. The method consists in placing a direct-vision 
system of prisms before the slit of the spectroscope, and then 
observing the interruption of the chromosphere by the dark body. 
The author compares observations by his method with those 
of Prof. Respighi, published in the Gazetta Offciale, No. 145. 
Respighi saw the approach of the moon 21.9 secs, before Secchi, 
but Secchisaw the last contact 12°3 secs. before Respighi. The 
Rey. Father therefore suggests the use of the ordinary method 
(that used by Respighi) for first contact, and of his own for last. 
—A study of the action of the principal derivatives of amylic 
alcohol on polarised light, by MM. Pierre and Puchot.—De- 
velopment of the freshwater alge of the genus Batrachosper- 
mum, alternate generation ; second note, by M. Sirodot.—On 
the nature and treatment of ear tumors (o7ed//ons), by M. Bou- 
chut.—On //j/odes martinicencis, by M. A. Bavay.—Documents 
relating to the short-period Comet M, 1867, by Mr. Hind, 
M. Stephan, MM. Paul and Prosper Henry, M. André, 
and M. Baillaud. . Communicated by M. Le Verrier.— 
Discovery of a new small planet by Mr. J. Henry, at 
Washington, U.S.A. — Displacement of a body subjected 
to four conditions, by M. Ribaucour.—On the action of 
the electric fluid on flames, liquids, and powders, ‘second note, 
by M. Neyreneuf.—On the detection and estimation of plumbic 
sulphate in the lead chromates of commerce, by M. Duvillier. 
Toe author adds nitric acid and alcohol, the chromate is then 
r-di:ced, the lead and cromic oxide are dissolved by the nitric 
Were Apo e ee a hee en mee Nee “oa 
NATURE 
- 
vets 
| ¥unz 12, 1873 
acid, and the sulphate, if present, remains insoluble.—On the 
action of nitric acid on plumbic chromate, by the same author.— 
On a base isomeric with piperidin, and on the nitrated deriva- 
tives of the hydrocarbons of the formula C,mH,m, by M. H. 
Gal.—On the molecular rotation of gases, by M. Hinrichs.— 
Experimental researches on the pathogeny of infarctus, &c., by 
M. V. Feltz.—Observations on a recent note, by M. Rabuteau, 
relative to the toxic properties of the iodides of tetramethylam- 
monium and tetramylammonium, by Messrs. A. Brown and 
Th. Fraser.—General results of the analysis of the Geyser springs 
of the island of San Miguel, Azores, by M. Fouque. During 
the meeting an election to the place in the Mechanical section 
left vacant by the decease of M. Ch. Dupin, was held with the 
following results:—M. Resal, 31 votes; M. Bresse, 17; M. 
Boussinesq, 3; M. Haton de la Goupillitre and M. Maurice 
Lévy, 1 each. M. Resal was accordingly declared duly elected. 
DIARY 
THURSDAY, June 12. 
Royat Society, at 4.—Election of Fellows. 
Socrety oF ANTIQUARIES, at 8.30.—What Parts of Lincoln Cathedral are 
really of the Time of St. Hugh of Grenoble, a.D. 1192-1200? J. H. 
Parker, C.B. 
MATHEMATICAL Society, at 8.—Some general Theorems relating to Vibra- 
tions: Hon. J. W. Strutt.—Invariant conditions of three and four con- 
currence of three Conics: J. J. Walker.—Locus of the point of concourse 
of tangents to an epicycloid inclined to each other at a constant angls : 
Prof. Wolstenholme. 
FRIDAY, June 13. 
ASTRONOMICAL Society, at 8. 
UEKETT CvUus, at 8. 
ORTICULTURAL SOCIETY, at 3.—Lecture. 
Society oF Arts, at 12.—Purchase of Railways by the State: Wm. Galt. 
SATURDAY, June 14. 
Roya Botanic Society, at 3 45. 
MONDAY, June 16. 
TUESDAY, June 17. 
ANTHROPOLOGICAL INSTITUTE, at 8.—The Ainos: Licut. S C. Holland, 
R.N.—Account of an Interview with a Tribe of Bushmans in South Africa ; 
G. W. Stow.—Specimens of Native Australian Languages: Andrew 
Mackenzie. 
ZoovocicaL Society, at 8.30,—On the Oncol. of the Maltese fossil 
Elephants: Dr. A. Leith Adams, F.R.S —On the Geographical Distribu- 
tion of Asiatic Birds: H. J. Elwes. 
STATISTICAL SOCIETY, at 7.45- 
WEDNESDAY, June 18. 
METEOROLOGICAL Society, at 7.—On some Results of Temperature Obser- 
vations at Durham: John J. Plummer.—On the Meteorology of New 
Zealand, 1872: C. R. Marten.—On the Climate of Vancouver Island: 
Robert H. Scott, F.R.S.—Meteorologicai Observations at Zi-Ka-Wei, 
near Shanghai: Rev. A. M. Colombel and Rev. S. J. Perry.—Notes on the 
ASIATIC SocIETY, at 3. 
Connection between Colliery Explosions and Weather: R. H. Scott, 
F.R.S., and Wm. Galloway.—Annual General Meeting. 
HorTIcuLTURAL Socirety.—Exhibition. 
THURSDAY, June 19. 
Royat Society, at 8.30. 
Society OF ANTIQUARIES, at 8.30. 
Linnean Society, at 8. 
Cuemicat Society, at 8.—On the Influence of Pressure upon Fermenta- 
tion. Part II. : Horace Brown.—Researches on the Action of the Copper- 
Zinc Couple on Organic Bodies, III., and on Normal and Iso-Propyl 
Iodides: Dr. J. H. Gladstone and A. Tribe.—On Cymenes from different 
sources optically considered; Dr. J. H. Gladstone.—On the Action of 
Bromine on Alizarine: W. H, Perkin.—On some Decompositions and 
Oxidation Products of Morphine and Codeine Derivatives: G. L. Mayer 
and Dr. C R. A. Wright.—On the Decomposition of Tricalcic Phosphate 
by Water: R. Warrington.—Oa a new Tellurium Mineral, with Notes on 
a Systematic Mineralogical Nomenclature: J. B. Hannay.—Communica- 
tions from the Laboratory of the London Lastitution, No. XII ;—On New 
Derivatives of Cresol: Dr. H. E. Armstrong and C. L. Field. 
CONTENTS 
Pace 
JEREMIAH HORROX = . upla) aie ce wes + 2) 8) ol 
Carus’s History or Zoo.ocy. By Dr, P. H. Pye-SmitH . .. . 118 
Our Book SHELF. 7. Set se + 0” 0, oo) oe a 
Lerrers To THE Epitor:-- 
Jacamar in Britain.—Rev. Canon KINGSLEY . ¥ . 120 
The Use of Wires in correcting Echo.—Rey. R.S.GreGG . . 
Fertilisation of the Wild Pansy.—W. E. Harr . . ... . . 421 
Fertilisation of Orchids.—W. A..ForBES .... . ° « Tar 
Ground Ivy: -7." 5) Spee ets 2 ae 
Hail Storm.—E. J. Lowe, F.RS. .. . 
APG. PM esi 
Tuermo-Evecrriciry: Reve Lecture at CAMBRIDGE, II. By Prof. 
P. G. Tair, F.R.S.E,. (Wit Diagrams) so ss ee ee 
Tue Law or Storms Devexopen, [. By Prof. T. B. Maury (With 
Litustrations) . a se ee ee ye ss a ty en 
THE CoronAL ATMOSPHERE OF THE Sun,I. By M. JANSSEN (With B yw 
Lldustvations). » . 3% Gi msaMe + = 0 © se toe ge 
ONES oe > 8 ek « % i229 
On Muscucar IRRITABILITY AFTER SYSTEMIC DEATH: CROONIAN 
Lecture. By Dr. B. W. Ricwarpson, F.R.S. . . <a) oe eee 
Scignriric SERIALS . . . Queens Ss 3) 6) @ s) le ee 
SOCIETIES AND ACADEMINS. 4/5 © ¢ © © © s + © © 6 «lip eee 
DAY. 1 7. = «os eS Se) wf oe ee «@ 6 AZO 
ern, 
