VOL. VI.J PHILOSOPHICAL TRANSACTIONS. . 0Oi 



therefore in my private notes entitled it, cimex ruber maculis nigris distinctuA 

 super foliii hyoscyami frequens. It is observable, that that horrid and strong 

 smell, with which the leaves of this plant affect our nostrils, is very much 

 qualified in this insect, and in some measure aromatic and agreeable, and there- 

 fore we may expect, that that dreadful narcosis, so eminent in this plant, may 

 likewise be usefully tempered in this insect; which we refer to trial. About the 

 latter end of May, or sooner, you may find adhering to the upper side of the 

 leaves of this plant, certain oblong orange-coloured eggs, which are the eggs of 

 this insect. 



Note 1 . These eggs while in the belly of the females are white, and even 

 sometime after they are laid; but as the young ones grow near the time of 

 being hatched, they acquire a deeper colour, and are hatched cimices, and not 

 in the shape of worms. 



2. These riper eggs, if crushed on white paper, stain it with as lively a ver- 

 milion or couleur defeu, as any thing I know in nature; cochineal when assisted 

 with oil of vitriol scarcely excepted. 



Some Observations concerning Glow-worms. Communicated by Mr. 

 John Templer, in a Letter to a Friend of his in London. May 31, 

 1671. N" 72, p. 2177- 



The glow-worm being so common an insect, it is unnecessary to detail the 

 remarks made by Mr. Templer in his own words : the chief particulars are, 

 that the glow-worm's light is so very vivid as to be easily perceived through a 

 common pill-box, even when lined with paper. Mr. T. also persiuided himself 

 that he perceived a degree of heat from the insect, when shining in its fullest 

 splendor. 



An Account of some Books. iV°72, p. 2179- 



I. Of the Usefulness of Experimental Natural Philosophy, the Second 

 Volume, by the Honourable Robert Boyle, Esq. F. R. S. Oxford, 1671, 

 in 4to. 



This illustrious author proceeds in this 2d volume to deliver six very in- 

 structive and useful essays. — The first of which contains some general con- 

 siderations on the means whereby experimental philosophy may become ad- 

 vantageous to human life; not only by bringing improvements both to 

 the trades that minister to the necessities of mankind, and to those that serve 

 for man's accommodation and delight; but also by introducing new ones.— 



4G 2 



