EVAPORATION RECORDS FROM THE GULF COAST 
LAURA GANO AND JEROME MCNEILL 
(WITH FOUR FIGURES) 
In connection with field work in northern Florida, undertaken 
to determine the composition and limits of certain gulf coast forest 
associations and their relations in succession, and following the 
instructions of LivincsTon,’ FULLER,? and the work of others in 
the north and west, records of the daily rate of evaporation in 
several of the typical plant associations were kept, some of them 
running through a period of 19 successive months. The Livingston 
rain-correcting atmometers were used and care was taken to follow 
the directions for their operation in all particulars. It was planned 
to visit each station once in two weeks, and this was carried out 
with few interruptions. 
Station no. 1 was in an upland hammock forest on Norfolk Fine 
Sandy Loam. Magnolia grandiflora, Fagus grandifolia caroliniana, 
and Acer floridanum Pax (or Acer saccharum floridanum Sarg. Silva — 
N. Am.) were the chief trees, with an undisturbed growth of young 
trees of these and other species and of mesophytic shrubs and 
herbs. The apparatus at this station suffered various mishaps, and 
the record is broken, but from January to May 1913, which includes 
the times of extreme minimum to maximum evaporation for all the 
stations (except that of Pinus palustris), the record is complete. 
Station no. 2 was in an upland oak forest on Orangeburg Fine 
Sandy Loam, 2.5 miles west of Tallahassee. In this forest nine- 
tenths of the trees were deciduous, with Quercus falcata, Q. stellata, 
and Carya alba predominating. Cornus florida was common, but 
Q. virginiana and Ilex opaca (broad-leaved evergreens) were rare. 
Myrica cerifera, Rhus copallina, Ilex vomitoria, Ceanothus ameri- 
canus, Aralia spinosa, Vaccinium stamineum, Callicarpa americana, 
* Livincston, B. E., Evaporation and plant habitats. Plant World 11:1-9- 
1908; Operation of the porous cup atmometer. Plant World 13:111-119- 1919- 
2 Futter, G. D., Evaporation and plant succession. Bor. Gaz. 52: 193-208. 
Igtt. 
Botanical Gazette, vol. 64] [318 
