( 99^ > 
fome ingenious Anatomift were appointed for this for- 
vice, when it fhall liappen ^ tor this cafe, if rightly 
inquired into, may be of ufe and fatisfadion to the cu- 
^ious. 
V. A Letter from Vr William Mufgrave, F. R. Si 
to the Publijher^ concerning fome Experimenn 
made for tranjmitting a Blue coloured Liquor in- 
into the LaHeals. 
Exon, Sept. 24. 1701. 
SIR, 
T'He nexc Theory ofContinud Fevers, lately publifht, 
fpeaking (page 54, 5 J of that confiderable experi- 
ment of Dr L//?ers,- made for colouring the Lafteals^ 
and Printed, Phil. Tranf. N. 145 ^ as iftheDr conld ne- 
ver get the experiment done to his fatisf^ciion 5 and intima- 
ting, Tihdt People may he deceived with Blue TinSures 3 
for {that'] this is the natural colour of thefe La[ieals^ when 
they are almoji^ or altogether empty' I have drawn out of 
my Jdverfaria the fumm of what was, a little after that 
Tranfaftion came out, done by me, in this matter. 
Feb. 168 J I injected into the Jejunum of a Dog, that 
had for a day before but little Meat, about 12 ounces of 
a folution of Indigo in Fountain water 5 and after three 
hours opening the Dog a fecond time, I obferved feve» 
ral of the Lafteals of a Bluijh xolouv ^ which upon 
ftretchingof the Mefentery, did feveral times difappear ^ 
but was moft eafily difcern'd when the Mefentery lay 
loofe 5 an Argument chat the Blui/h colour, was not pro- 
perly of the Veifel 3 but of the Liquor contained in it. 
A 
