C 4®4 3 
' broke between the Fingers, and crumbled into fmall 
Grains, It is true, that the State of Suffering of thefe 
Animals, occafioned by the Hurt, and increafed by a 
Food improper for them, might retard the perfed 
Reunion of their Bones ; yet I think, it certainly 
refults from this Experiment, and others which I 
fupprefs, becaufe they prove nothing more, that the 
Rubia Tmbioriim, taken inwardly, is rather prejudi- 
cial than beneficial in the Cafe of Fradures j and it is 
not without its Ufe to know what is to be avoided. 
The Rubtay probably, is not the only vegetable 
Subftance that can change the Colour of the Bones j 
and yet I have tried the Log-wood, the Anchufa and 
Curcumay without Succefs. In all Likelihood, it muft 
be a Subftance Icfs fufceptible of Alteration j and it is 
well known, that the Rubia is of that fort, feeing the 
Cloths dyed with this Root bear very well the Adion . 
of the Air, and that of boiling, 
1 have put the coloured Bones of my Animals to 
feveral Proofs: Firft, BelchieVy to that of boil- 
ing Water, and of Spirit of Wine, without the lead 
Change of Colour. It alfo reiifted Soap-fuds. A 
ftrong Lixivium of Salt of Tartar difcharged a little 
of the Colour, and made it look brighter. Vinegar 
made it take a yellowifh brown and obfcure Tinge. 
In fine, Alum-water difcharged the Colour pretty 
confidcrably, and the Water remained fomewhat 
vinous. Thus thefe Bones perfedly well refift: the 
lame Boilings as the Cloths dyed with the fame Root j 
but the Air ads upon them much fooner than on 
thefe Cloths: For the Bones of the Pullets in the 
Firft Experiment, thofe of the Turkeys in the Third, 
and thofe of the young Pigeons, that had cat of the 
Mad- 
