Twins, and tbruft one of them always back. The oth^r 
had all the due proportions of one Child, the head ex- 
cepted^ it having two heads, the oneftanding behind 
the other, the foremoft lefs than the due proportion, and 
bowed down upon the breaft having yellow hair, and 
wanting nothing ot the due proportions of the face fa ve 
one Cheek beneath the ey; the other bigger than ordi- 
nary, ftanding fomewhat higher, having no face which 
they fuppofe to have been disfigured by the back part of 
the other. Neither of thefe were opened s the Mothers 
are alive. I had the account of the firft from a Phyfcian 
who was call'd to the Woman in hard Labour, and fome 
women who were affiftantSj and the other from two M/^- 
rvives who were prefent. - 
Upon the ^ver of Don^ a little below the bridge neat 
the lever s mouth, there is a bank, the face of which is 
broken down, and it is full. of ftones which one would 
think were in/m 5 they are all either round or oval, of 
diiferent fizes; the faces of moil of them are broken off, 
they are foftand will eafily rub down with your hand, 
they are of different gritts and colours, and are made 
up of different lands and clays mingled together, the 
clay is lofc both to hand and taft, in fome of them white, 
in others gray, tho' in fome places the clay and fandare 
hardned to the confiftence & colours of iuch oval ftones 
as weufually feein the fields, but where they are at the 
fofteft, the bed that each flone lyes in,is alwayeshard and 
of another gritt and colour. What light this may give 
to the Natural Hijiory of the formation of ftones^, I fhall 
leave to the difquifition of others. 
There are fome things, which, tho' inconfiderable in 
themfelves, yet, may have their own place in the //?y/<?ry 
of iS&^^^r^, and will not be unacceptable if they have not 
been taken notice of already^ I fliall only mention one 
or two of them relating to Injccis, Mr. Leeiveiihoeck 
Numb. 94 and 97 of the PhiL Tratif. was the firft who 
gave 
