502 | Experiments {8 Obfervations 
color. Two of them were now placed in a 
_ giafs filled with atmofpheric air, where they 
were. left unobferved to the fifth, at the 
end of which time the germs had vegetated 
confiderably ; the lower parts of them ftill re- 
mained white; but their oppofite extremities 
had changed to their proper green. It may here 
be remarked, though the obfervation has but 
little conneétion with our prefent enquiry, that 
the circumftance of the inferior part of the_ 
germ in Peas and Beans conftantly preferving 
its primitive whitenefs, may be confidered as a 
proof of the roots of Annuals being different in 
their internal ftructure to Perennials, Shrubs, 
and Trees; for many inftances have been noted 
by naturalifts, fome of which are recorded in 
the fecond volume of Lowthorp’s Abridgement 
of the Philofophical Tranfations, (Page 673) 
of the branches of woody vegetables taking root 
when planted in an inverted pofition, and pro- 
ducing perfe& plants in this unnatural pofture : 
which fhews that the rudiments of all the dif- 
ferent fibres appertaining to a complete vegetable 
are comprifed in a particular part of it, when 
this is the cafe. But the circumftance juft now 
mentioned, is a ftrong evidence of a contrary 
nature in annuals: for, fince the rudiment of 
the root isnot fufceptible of a green color, it 
is plain that the part in queftion is deftitute of 
fomething 
