24 The Spider. 



whilst at the same time it does not give off the injurious vapour 

 so common to coal gas. 



For the products of combustion of the latter are — water, car- 

 bonic acid, sulphuretted hydrogen, and some others. Whilst those 

 of the former are simply water and carbonic acid. The sulphu- 

 retted hydrogen, so injurious to animal life, as well as to all kind 

 of paint or gold decorations, being absent. 



At the end of the paper, the Society passed a vote of thanks (o 

 the inventor of the Augasma Light for his kindness in lending the 

 model. 



Mr. Hayward then made a few remarks on " the lights we 

 burn," describing the three " cones" of which a flame consists, etc. 



March 3rd, 1866. 



The Seventh Meeting of the Society was held at the Rev. F. W. 

 Farrar's House. 



The following were the exhibitions : — 



A specimen of the Mygale Avicxilaria, or Bird-eating Spider of Brazil. 



The skin of a Flying Squirrel. 



Nest of the Tailor Bird of India, lent by J. Gibbons. 



By the President. 

 Three flint implements from St. Acheul . . By A. J. Evans. 



Specimens of Snow Buntings, Nuthatchers, Bramble Finches. 



By a. J. Latham. 

 Phragmocone of a large Belemnite . . . . By G. T. Pilcher. 



Portion of the first Atlantic Cable . . . . By C. C. Denny. 



The following Paper was then read by J. A. De Morgan on 

 " Spiders." 



THE SPIDEK. 



I. Points of Difference between Arachnida and Insects. — The 

 spider belongs to the arachnida class, and it is a common mistake 

 to consider this class as insects. The spider is not an insect, as 



