380 
Ill.—FROST AND BEHAVIOR OF PLANTS. 
Portulaca oleracea. Early in September tips slightly affected by 
frost; Oct. 1st, frost nearly destroyed it; oth, in an open 
field, black; 18th, started to grow again. 
Amarantus blitoides. TEarly in September slightly affected by 
frost; Oct. 7th, frost nearly destroyed it; oth, black; 18th, no 
attempt at growth, as in the case of Portulaca. ‘ 
A. albus. Oct. 11th, destroyed by frost. 
Apios tuberosa. Oct. 11th, completely killed by frost in low 
ground. 
Panicum sanguinale. Oct. 8th, more or less destroyed by frost. 
Panicum capillare. Oct. 8th, more or less destroyed by frost. 
Zea Mays. Oct. 7th, young plants completely frozen; 16th, old 
plants have been dry for several days. 
Sorghum vulgare. Oct. 7th, more or less affected. 
Cucurbita Pepo and C. maxima. Early in September tips 
slightly frosted; Oct. oth, plants black. 
Lycopersicum esculentum, Early in September tips slightly af- 
fected by frost; Oct. 4th, killed by frost; 9th, plants black. 
Borrago officinalis. Oct. 22d, a few leaves affected; 23d, many 
leaves frozen. 
Asclepias Syriaca. Oct. 7th, not affected by frost; 11th, slightly 
frosted in low places; 24th, completely frozen. 
Euphorbia heterophylla. Oct. 7th, slightly frosted; 19th, nearly 
all leaves frosted. 
Vitis riparia, Oct. 8th, slightly frosted. 
Vitts—Concord grape. Not affected early in September; Oct. , 
14th, somewhat frost-bitten, some leaves brown; 21st, leaves 
much frosted; 22d, all frosted, falling rapidly. | 
Callirhoe pedata. Oct. 7th, not affected by frost; 16th, seriously 
affected. 
Scabiosa atropurpurea, Oct. 7th, no injury whatever; 23d, n° 
injury; Nov. 11th, no injury; 21st, some injury to leaves. 
Adonis autumnalis. Oct. 2d, no injury to leaves; roth, no injury; 
Nov. 2, no injury to leaves whatever; 21st, no injury to leaves. 
Centaurea Cyanus. Oct. 7th, no injury to foliage; 17th, not af 
fected; 18th, heavy frost, not injured; 22d, still green; Nov- 
