CAXADIAN BIOLOGY 13 



SESSIONAL PAPER No. 38a 



At the twenty stations where they carried on temperature and density observa- 

 tions, the air temperature ranged from 14-4° C. up to 30-1° C., ranging on the whole 

 between 16° and 17° C. The depths were U to 3 fathoms, to 5, 7, or 10 fathoms. The 

 bottom temperature ranged from 9-4° C. to 15° C, but chiefly ranged about 10°, 11°, 

 or 12° C. The bottom density varied from 1-0085 to 1-02498. The paper concludes 

 with a list of mollusks obtained from the bottom when dredging at seven of the 

 stations. 



XV. — IIYDROGRAPHIC INVESTIGATIONS, PASSAMAQUODY BAY (mr. HORNK CRAIGIE). 



Mr. E. Home Craigie continued the " Hydrographic Investigations in Passama- 

 quoddy Bay," which previous workers had carried on in former seasons. He selected 

 nineteen stations, so arranged as to give four vertical sections of the area examined : 

 two on the St. Croix river, one of Passamaquoddy bay from Tongue Shoal light to 

 Pendleton island, and one of the western passage. 



As the paper itself is a very condensed account of the observations made, it is 

 difficult to give a synopsis, and the twenty-three " graphs " with accompanying explana- 

 tion require to be consulted, along with the data of sections, and the table of densities, 

 with which the paper concludes. 



XVI. HYDROGRAPHIC. SECTION OF BAY OF FUNDY (mR. HORNE CRAIGIE). 



Mr. E. Home Craigie summarizes his " Hydrographic Investigations ill the Bay 

 of Fundy in 1914," in a paper illustrated with a chart, five graphs and a table of data, 

 affording information as to the temperatures, movements of the water, densities, etc., 

 in a hydrographic section of the bay, this section extending, from East Quoddy Head, 

 N.B., to Digby Gut, N.S. 



XVII. — IODINE, ETC., IN CERTAIN BRITISH COLUMBIA KELPS (PROF. A, T. CAMERON). 



The concluding paper of" the series, by Professor A. T. Cameron, Winnipeg, treats 

 jf the " Iodine and Water Contents of Six Species of Kelp on the Pacific Coast," and 

 the tables which are included in the paper are interesting as showing the effect of age 

 and of the period of the year, upon the chemical composition of these algae. The 

 -general results show that the percentage of iodine is almost always less and the water 

 greater in the float of the bull-kelp than in the fronds, or in the stipe. Young plants 

 of that sea-weed contain more iodine than fuU-grovsm ones. Yet as the total bulk of 

 the plant increases during the final stages of growth, the full-grown plants yield a 

 greater total of iodine, although the average content be less. An elaborate analysis of 

 eight species of British Columbia kelps is given by Dr. Cameron. 



CONCLUSION. 



It only remains to add that a further series of valuable reports has been nearly 

 completed by the staff of the Atlantic and Pacific stations, and that a new volume of 

 " Contributions to Canadian Biology " will, it is hoped, be ready for issue within a 

 few months. 



The work of the stations is rapidly extending and^ the interest of scientific investi- 

 gators in marine researches at the various universities is growing year by year. 

 Increasingly valuable results will, without doubt, follow. The stations so generously 

 supported by the Dominion Government are still able to carry on their important work 

 without salaried officers as the staff conduct their valuable work without compensation. 

 The only exceptions are certain assistants, and the main expenditures therefore are 

 those involved in the operation of the stations, boats, cost of apparatus, chemicals, etc., 

 and the travelling and boarding arrangements which it has been found necessary to 

 provide for the workers at St. Andrews, N.B., and at Departure bay, B.C. 



