194 
A plant of the spineless cactus, Opuntia tnermis, recently col- 
lected on Key Largo, Florida, by Dr. Small and Mr. Carter, has 
just flowered at the garden. It proves to have conspicuously 
different flowers from its near relative, the spiny Opuntia Dillenii, 
The flower receptacle is very long and the campanulate corolla 
is salmon-colored. 
A series of native economic specimens and a large collection 
of herbarium material were recently made in the Carolinas by Dr. 
Rusby and presented by him to the Garden. 
D arts of July and August observers of the, staff of the 
Carnegie Institution of Washington established a magnetic sta- 
tion on the.grounds of the Garden at a point east of the Bronx 
River 193.6 feet south southeast of i southwestern corner of 
the stone hut in the arboretum. At this place the various com- 
passes, deflectors and dip-circles to be ee on board the yacht 
“Carnegie” in her forthcoming cruise to Hudson Bay and across 
the Atlantic Ocean were standardized by W. J. Peters and J. P. 
This was done by comparing them with known standard 
land instruments. The Bae quantities were observed by 
them and are here recorded for future reference : 
Latitude = he 51! 7N. 
Meteorology for July. — The total precipitation recorded for 
July was 2.75 inches. Maximum temperatures were recorded 
of g2.5° on the rst, 89° on the 5th, 92° on the 13th, and 98.5° 
on the 30th. Also minimum temperatures were recorded of 
53.5° on the 5th, 51° on the gth, 56° on the 19th, and 61.5° on 
the zgth. . 
