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Microscopical Essays, 



ticularly the egg: Mr. Martin fays, that the internal fpungy fub- 

 fiance of bones may be better obferved in thofe of birds than of 

 any other animal ; even the feathers or fcales of a moth's wing 

 • amply repay the obferver ; thefe alfo vary in their texture and 

 figure ; but the largeft, and molt commonly applied, are from the 

 body of the fphinx flellatarum, or humming-bird moth ; a fpeci- 

 men is given, Plate XVI. Fig. E F H I. 



Tranfverfe feclions of all kinds of wood, efpecially thofe of a 

 pithy or foft nature ; their beauty will be feen by the figures in 

 Plates XXVII. XXVIII. XXIX. , 



The flowers of mofl grafles, with all the varieties of mofFes % 

 the farina of flowers • mouldinefs, which evidently appears to 

 vegetate ; all the kinds of fpunge, fea weeds, particularly the 

 confervse, which is jointed like a cane. The extenfive family of 

 corallines prefent an elegant appearance ; the mofl beautiful are 

 the fea hair, fea fir, fickle, fox tail, Sec. defcribed by Ellis. 



Differed leaves, which fhew the fibres and nerves ; the human 

 intefHne, injected with wax, is a fine object, as are many other 

 anatomical preparations. The feed of the filver-rind birch ap- 

 pears like an infe£l; feed of the quaking grafs is alfo much 

 admired, as is the leaf which covers the feed of forrel. Among 

 artificial productions, the edge of a razor, and point of a fine 

 needle, as alfo fine cambrick, evidently difcover the inferiority of 

 the workman ; particles from the collifion of flint and fteel, wire 

 melted by the ele6lric explofion, &c. Sec. &c, 



Tlie 



