PartI. Of the Eggs' and Nests of ‘Birds. 
of the Wings. Both given by the forementioned Per- 
fon. 
The HEAD of the TROPICK BIRD. 
The two Tail-Qmlls ot the fame. 
CHAP. IV. 
Of the EGGS and NESTS of BIRDS. 
O F EGGS, there is here a confiderable number: which 
therefore I thought fit to put altogether in this 
Chapter. Their Figures, as they Hand together, appear 
the more various. For fome are almoft Sphatrical or 
Round as a Ball: others, as the moil, are more oblong. 
Of thefe, fome few are perfectly Oval, i. e. with both the 
ends defined with two equal Ellipfes: but molt are Conical, 
or with one end fharperthan the other. Of thefe again, 
moll have their fmaller end but Blunt; fome few, very 
fharp. Laftly, almoft all both Blunt and Sharp are Con- 
vexly Conical, i. e. they are all along Convex, not only 
per ambitum , but between both ends : whereas fome few 
are Plano-Conical, whofe Superfice is in part level be¬ 
tween both ends. 
Their Colours arc alfo various; as White, Pale, Livid, 
A(h-colour, Blew, Brown, Green. Their Spots, and Speckles, 
are alfo Iron-colour d, Red, Bay, Musk-colour, Black, See. 
the Caufes of all which, both Figures and Colours, were 
no unfit fubject of enquiry. But here I can do little 
more than Ihew, to what Eggs in particular any of them 
do belong. 
The EGG of an OSTRICH. Tis very fmooth, and 
white 5 all over prick as it were with extream fmall brown 
Specks. Almoft of a Sphterical Figure. About half a foot,by 
its Axis, from end to end. Round about, by the breadth, 
fixteen inches, e. near five inches and ; ftrait over. 
Both the ends of an equal Convexity. Sometimes fo big, 
faith Mr. Willughby , as to weigh fifteen pounds. The 
Shell is of anfwerable thicknefs, in regard to its bignefi, 
to that of other Birds Eggs. They are fometimes let in 
Silver, and ufed as Cups. 
L 2 
Another 
