C 4 2 4 ) 
2. Whether different Load-ftones will give different Dire&i- 
,onsf And whether fainter or ftronger touches upon one and the 
fame Magnet, will caufe any Variation in the Diredions * For 
which purpofe, as many Load-ftones fliould be procured, as could 
be had, and a good number of Needles exadly made, of the fame 
Metal, bignefs ; and figures 
PROPOSALS 
Totrythe Effect sof the Pneumatick Engine exhauftef in Plants ? 
Seeds , Eggs of Silkworms. 
The Ingenious Dr. Beale did formerly fuggeff, as follows. 
It would bej think ( faith he) very well worth the tryal,to fee what 
Effeds would be produced on Plants, put into the Pneumatick for 
Rarifying ) Engine of Mr. Boyle the Earth about rheir 
Roots, anddourifhing* whether they would not fuddenly wither 
"if the Airwere totally taken from them. And particularly to try 
in the Seafon, Cherry -Blo/foms ? when, partly opened, partly not o~ 
pened, upon a Branch*, to wit whether the Airmav befo atte- 
nuated as to bluff. But it may Be noted, that the Bloifomsdo not 
forthwith difcover the blaft: An old experienced Country-man 
having once given me notice of a blafty Noon, (it being then a 
-Sultry weather, and fomewhat gloomy with the thicknefl of Ex- 
halations, almoft like a very thick Miff) and within -a day or two 
{hewing the proof upon the Cherry- Bloffoms then flagging, but 
not much altering their Colour till two days more were paff/ 
The Noble Mr. Foyle fuggefts as proper for the approaching Sea- 
fon t, T hat it may be tried, 
i* Whether Seeds (efpecially fuch as are of a hafty growth, vid. 
Orpin^ Lettic <?, Garden-cref s-fi teds-> &c.) will germinate and thrive 
in the exhaufted Receiver of thefaid Engine ? 
2. Whether the Exclufion of Air from the Sensitive Plant, 
would be harmful to it ? 
3. Whether the Grafting of Pears upon 'Spina Cervina (the 
almoft only Purgative Vegetable known in England ) will pro- 
duce the effed of communicating to the Fruit that purging qua- 
lity, or not < 
4. Whether Silkworms Eggs will be hatched in fuch an exhau- 
iled Receiver, in the Seafon proper for hatching 1 
To 
