C 538 ) 
ficient todiftarbthc Experiment in Plants, and prefervation of 
bodies, efpcciaily when added to the Air extricated from thofe bo- 
dies : And I the rather favour this fufpicion, becaufe all the bo- 
dies were fomething putrified, which Mr. B^yd^'sexaftcr Experi- 
ments prevented. Thefe Experiments further iliuftrated, will add 
much CO the opinion of Refpiration of Plants, and metion of their 
juices by the Air. The water through the trunk forms bubbles, 
becaufe it meets with the Air in thofe pipes through the leaves, 
only mild drops by a fimple percolation. 
In the continuaticn of Jamaryjoy which and what lAr.BojU has 
writ, we fee the nature of the Air,its efFefts on bodies when prefcnt; 
by procuring its abfence. Now Sir W, Petty can no more complain 
at the idle employment of Weighing Air ; for the dodrine being 
well illuftrated, and the Theory eftabliflied,we thus defcend again 
to more ufeful and grounded Experiments; as the method mentio- 
ned by my Lord Bmn^ to proceed from Experiments to Axioms 
and AflTertions^ fromthefe, as too general, to particular and ufe- 
ful Experiments, which before w^e could not do, till we had 
cleared the Doftrine from wide and extravagant gheflfes. 
Fruits are neither exaflly preferved in the free Air , nor quite 
without it; too much exciting the praedatory Spirits to con- 
fume the more folid fnbftance; the vpantof Air hurting them as 
" much as it hinders Vegetation; which is obfcnrely performed in 
all conferved Fruits, theftemor externals fupplying the office of 
the root : But Fruit is better in confervatories , where thercis 
Airenough tonourifli,butnot toconfumethem. Pag, 494, where 
the Cherries are m'entioned to be corrupted in left than an hour, 
when taken out of the vacuum , that may be referred to the ex- 
alted Spirit, which avo'ated on the ftrft falute of the A;ir : 
That Bread yielded no Air , may be imputed to the open pores : 
That Beef yielded much fpringy Air, to the ftrong Saline fpirit in 
theflefb. 
The indpftrious Author of the Hifiory of Birds gives meoccafion 
to v\ifiij that fome ocher would undertake that of other Creatures 
(the Preface feeiiis to promife fomething, from that noble Author, 
of Amr^als^) as Minerals^ liifeCis^tjhes.x^c.^ them to their 
Gaffes with Philofophical Obfervations, ufeful to illuftYare many 
paffages in Experimental Philofcpby. 
Where 
