C 1 
the Madder. The Bones of the firft were, as I have 
faid above, of a very lively Carmine-red, in fome 
Places of a Crimfon ; and I have fome of them of 
the Colour of yellow Okre 5 but whence this Dif- 
ference arofe, I could not difeover. Thefe tinged 
Bones being broke, while frefh, or before drying in 
the Air, feemed to me fomewhat bigger and fuller 
of Marrow j but alfo more fpongy, or of a loofer 
Texture, and eafier to break, than the white Bones of 
the Pigeons fed with Meal only. The Parts of thefe 
Bones that had the lead Degree of Hardnefs, broke 
between the Fingers, which remained coloured from 
them: And this Tindure does not come from the 
Marrow, which continues in its natural State, like 
all the other foft Parts. The fame Parts in the white 
Bones were not to be broke in this manner. 
If we recoiled, that the Pigeons fed with the 
Mixture of Meal and Madder are always in a lan- 
guifhing Condition, in a continual Decay 5 it will 
be eafy to judge, that this is the only Reafon why 
the red Bones muft be not fo well formed, nor fo 
hard, as the white Bones of the Pigeons fed with good 
Aliments. But why are they bigger, and, as it were, 
puffed up ? It is hard to fuppofe any other Caufe of 
this, but the Interpofition of the colouring Feecula 
of the Madder between the Lamellee of the Bones, 
Thefe heterogeneous Particles hinder the immediate 
Contad of thefe Lamell£'-> and thence proceeds the 
preternatural Increafe of their Size, and their little 
Solidity. Upon viewing thefe Bones with a good 
Glafs, their fmootheft Surface appears bored with a 
vaft Number of fmall Holes, in which the colouring 
Faciila is perceived. And with a Microfeope that 
mag. 
