274 Scientific Intelligence. 
a power of turning common materials and ordinary observations to high 
scientific account, which, if equalled, have not been surpassed since the 
days of Hunter and Charles Bell. This will be the opinion equally, we 
isli in’s the- 
direct or incidental. In the present case the bearing is obvious. The 
gradual acquisition by certain plants of advantageous peculiarities is in- 
ferred from the gradation of forms and functions. Properties and pow- 
to generation. Tendril-bearing plants,—-the most specialized in structure 
and the most exquisitely adapted to the end in view,—are su d to 
ually Sweeping round, in circles widening as it grows, and always i 
on, in sea some object round which totwine. The 
Hop revolves with the sun; the Convolvulus, Bean (Phaseolus) &¢, — 
known that this outstretched portion, while at the proper age, is contin- 
‘ deta 
. urty-seven revolutions in one internode of a Hop,—the first rev 
tion made in about 24 hours, the second in 9 hours, the third and the follow- 
ing ones up to the eighth in a little over 3 hours each. “The shoot hs 
Pesan in th, and carried at its extremity a young = 
Tt *h in length, which showed slight changes in its curvature. 
The next or ninth revolution was effected i E sa i 
