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1876.] Scientific Serials. 63 
generating oxide of iron and sulphuric acid, which readily form sulphate 
of iron. 
_ Natura, History Socrery or MONTREAL. — November. <A 
paper by Mr. H. G. Vennor, on the galena and plumbago deposits of 
Eastern Ontario, was read. Mr. Vennor believes that all the so-called 
Laurentian rocks which contain Eozoön and many metalliferous deposits 
(galena, apatite, etc.) are of Silurian or Cambrian age. These rocks 
are always associated with crystalline limestones. The Huronian group 
he believes to be next oldest, and lastly there is a great tract of Azoic 
gneisses, etc., which are truly Laurentian. The true Azoic Laurentian 
„in this view, do not contain metalliferous deposits, nor crystalline 
limestones. 
PEET ERER 
. SCIENTIFIC SERIALS? x 
PROCEEDINGS OF THE ROYAL GEOGRAPHICAL SOCIETY, xix. 7. — 
Summary of recent Observations on Ocean Temperature, made in the 
Challenger and Tuscarora, in relation to the Doctrine of a general Oce- 
anic Circulation sustained by Difference of Temperature. 
PETERMANN’s MITTHEILUNGEN, xxi. 10. — The Russian Amu- 
Darja Expedition. A Natural History Journey to Patagonia, by Dr. K. 
Berg. Chinese Travelers of the Middle Ages to West Asia, by Dr. E. 
Bretschneider. Journey to Araguaya by Dr. Couto de Magalhaes in 
January, 1865. Notes on the Oasis El-Chargeh, by Dr. Schweinfurth. 
C. Weyprecht’s Survey of the Northern Coast of Nowaja Semlja in Sep- 
tember and October, 1872. October 18. Paul Solcillet’s and Largean’s 
Travels in the Sahara and to Soudan, by Gerhard Rohlfs. Pictures from 
the Far North, by Karl Weyprecht. The latest Travels in Australia, by 
E. Behm. The Spread of the Egyptian Power in the Upper Nile and 
its Geographical Rësults. Supplementary number, 34. Journey through 
North Africa from Kuka to Lagos, by G. Rohlfs. 35. The Population 
of the Earth, by Behm and Wagner. 36. Four Addresses on the 
Caucasus, by G. Radde. 387. Carl Mauch’s Journey in the Interior of 
South Africa, 1865-72. 
THE GEOGRAPHICAL MAGAZINE. — November, 1875. The Arctic Ex- 
pedition, iii.,iv. A Glance at the Results of the Expedition to Hassar 
by H. P. Lerch, by H. Yule. The Voyage of the Challenger, by J. E. 
Davis. Recent Journeys in Paraguay, by Keith Johnston. 
BULLETIN pe LA Socréré: pe GÉOGRAPHIE. — September, 1875. 
Rise and Fall of the Coast of France, by Jules Girard (records the dis- 
covery, between Vannes and Nantes, of Druidical monuments, under the 
water). Geography of the Athabaskaw-Mackenzie, by Abbé Petitot. 
1 The articles enumerated under this head will be for the most part selected, so 
that the entire contents of the journals are rarely given. 
