660 PHILOSOPHICAL TRANSACTIONS. [ANNO 1094. 



diameter, with a lid to slide open, and shut, upon every end of them ; so that 

 by opening any of these holes, or all of them more or less, or taking off the 

 whole plate, I can release such a quantity of air out of the house to blow the 

 fire, as to increase or diminish the blasts; and, as you were pleased by letter 

 to inform me, concerning distributing the air at its admission more equally 

 though the house, I have inserted my pipes into a channel all along the waH 

 at the end of the iiouse, with those several openings you mentioned, &c. 



On a Whirlivind, in a Postscript of a Letter, dated ^ug. 4, i6Q4, from War- 

 rington in Northamptonshire, to a Rev. Divine in London. N°212, p. 192. 



On the first instant, there happened here, between one and two o'clock ia 

 the afternoon, a very terrible whirlwind. It took up into the air about 80 or 

 100 shocks of corn, carrying a great deal quite out of sight, the rest it scat- 

 tered about the field, or on the tops of the houses or neighbouring trees. I 

 have seen corn, which was carried a mile from the field; and it is reported by 

 persons of good credit, that some was carried 4 or 5 miles distant. The whirl- 

 wind continued in Acremont Cloee full half an hour; I myself, and several 

 other persons, saw at least three or four waggon-loads of corn all at once 

 whirled about in the air. 



Extract of a Letter from M. Anthony Van Leuwenhoeck, to the R. S. contain- 

 ing the History of the Generation of an Insect, by him called The fVolf. 

 With Observations on Insects bred in Rain-Water, in Apples, Cheese, &c, 

 N°213, p. 194. 



The wolf* is a small white worm, armed with two red shears or teeth, at 

 the fore-part of its head, with which it bores and feeds on the grains of corn, 

 and makes its way through wood itself. Having formerly often inclosed 

 some of these worms with some wheat in small glass tubes, I always found 

 that they died before the time of generation : wherefore in the summer I put 

 some of them with the wheat in a box, and observed that one of them joined 

 6 or 8 grains together, lodging itself in one of them, the rest being likewise 

 all hollow and eaten out. The worm spins a thread, with which it joins the 

 corn together, and fastens itself to glass or other smooth bodies. When I 

 put tViem in boxes, they eat their way out ; and when I put them in glass tubes, 

 they bored through the corks that stopped the glass tubes ; to prevent which, I 



1. ■ ' 



. * This insect is the larva or caterpillar of the Phalcena granella. Lin. It belongs to the tribe of 

 Tipeae, apd U thus described by Liunaeus, viz. Phalcena Tinea alts albo nig^roqw maculatis, capitt 



