60° SOUTHERN CALTFORNIA AGADEMY, OF SGIENGES 
Ege C, a sterile ege subjected to the same treatment, lost 
8.768 2., or 15.5 per cent. 
Ege B weighed at the beginning of incubation 62.842 @., and 
during the time of incubation lost 13.699 @., or 21.64 per cent. 
The chick hatched from the egg weighed 44.204 g., or 18.638 g. 
less than the ege before incubation, a loss of 29.65 per cent. 
Kee D was so violently shaken previous to incubation that it 
was killed. Its treatment was the same otherwise as egg B. 
The loss of egg D during the time of incubation was 10.571 g., 
or a loss of 17 per cent. 
A Visit to Rock Creek 
*BY ANSTRUTHER DAVIDSON, C. M., M. D. 
On May 30th, Dr. Hasse and I took the stage for Shoemakers’ 
Ranch on Big Roek Creek, for a week’s botanizing in the desert 
foothills. This creek hes about 30 miles east of Palmdale and 
drains a wide area on the northern slope of Mount San Antonio. 
At this time most of the annual vegetation on the desert 
proper was dried out, but on the foothills above the 4,000 feet 
level many species were still in flower. From Shoemakers a 
good wagon road now runs up the creek to the Lowell Mine, 
7,000 ft. alt., along this way most of our collecting was done. 
Among the specimens gathered were two new varieties and 
the following species hitherto reported as not found in Los 
Angeles county : 
Eriophyllum confertifiorum lariflorum, Gray, was very com- 
mon, the woolly fruited form of Layia heterotricha, H. & A. 
frequent: Linanthus androsacus breviculus, Milligan, the most 
common Gila on the foothills; Linanthus concinnus, Milligan, 
at 7,000 ft .alt.; Ribes cerium, Dougl., Quercus kelloggi, Newb., 
and Amelanchier alnifolia, Nutt., at 6,000 ft.; Collinsia callosa, 
Parish, was common; Pyrola rotundifolia bracteata, Gray, and 
Melica stricta, Bol., were found among the p nes; Aira elongata, 
Hook., at a lower altitude. Chorizanthe perfoliata, Gray, is 
fairly common; the common Brickelha is probably B. Wrightii, 
Gray. One plant of Pholisma arenaria was found by Dr. Hasse 
*Read before Botanical Sect., Nov. 1, 1906. 
