90 
which many species are first made known ; and the first part of 
Dr. Britton’s Contributions to the Flora of the Bahama Islands. 
Garden Bulletin No. 12, issued May 8, contains the annual 
reports of the Director-in-Chief and of other members of the 
staff, the report of the Treasurer, and that of the committee on 
sae 
MacDougal returned from an nas to the 
eonae on April 29. Accompanied by Mr. E. A. Gol 
man, of the U. S. Biological Survey, Mr. G. G. Copp and 
Messrs. S. and G. Sykes, a descent of the Colorado river was 
made from Mellen, Arizona, and an examination made of con- 
tiguous deserts and the delta of the river. Especial attention 
was paid to the Cucopa mountains, hitherto unvisited by bot- 
anists. Living specimens of about eighty cacti were secured as 
well as a large number of herbarium specimens. Some impor- 
tant geographical data were also secured 
The total eae in the Grden during March, 1905, 
amounted to 4.47 inches. Maximum temperatures of 45.5° on 
the third, 51.5° on . tenth, 68° on the eighteenth, 63.5° on the 
twenty-sixth and 75° on the thirty-first were observed: also 
minima of 9.5° on the fifth, 19.5° on the seventh, 19° on the fif- 
teenth, and 29.5° on the twenty-secon 
The total ean during April, 088 amounted to 2.88 
inches. aximum temperatures of 63° on the ninth, 70° on the 
tenth, 76° on the twenty-first and 74.5” on the twenty-fifth were 
observed. The minimum thermometer was found to be out of 
order and the records for this month were discarded. 
A second edition of Dr. Britton’s “Manual of the Flora of the 
Northern States and Canada,” was issued by the publishers, 
Henry Holt & Company, on May 1. Descriptions of additional 
species made known as occurring within the geographical area 
covered by the work have been added, chiefly in the appendix; 
extensions of ranges brought out by observations since the pub- 
lication of the first edition in 1902, have been noted; and con- 
siderable synonymy has been supplied in the text and errors have 
been corrected 
