(213^) 
Cyafius flowers 5 of a fairer red 5 alfo the juices of theBer* 
Ti€So( Ligujirufpf ^oihhckChQvry^s^ Buck-thorn- berries 5 of a 
much fairer red : and to the fame purpofe Acid Salts make no 
great alterations upon the white flowers of Jafmin and Snovv - 
drops. 2. Thzt VrwoujS^hs.,^nd Jlcalys^ on the contrary^ 
quite alter and change the Colours of the fame flowers now na- 
med;, and the juices of the faid Berries a!fo/rom red to green 5 
even Jafmin and Snowdrops. 3. Again:,that in like manner 
ri//^?^ Spirits and Alcalfs advance^at leaft do not quite fpoyle 
the colors of the juices of leaves of VegetableSjOf their Wood 
and Root* Thus M. Boyle t^lh us^that Vrinous Spirits and Ai^ 
r^/^V make the yellow infufions of M^?^/^;/^r'r^?i?// red 5 of Bra* 
gsi/*n?i?<!?^5purplifh ^ Lignum NephrHicum^ blew 5 the red in.- 
fufion of Log vpoodj^xxx^lQ 5 of the Leaves of v?>e»^5red*4.Thar, 
on the contrary^-r^^-?^ Salts quite alter and change the faid infu- 
fions from red or blew^to yellow* 
In the next place we would note to you the effeds of Salts 
upon Animals in the produftion and Change of colours^but the 
Inftances are very few or none, that 1 meet with in any Author, 
thtFurp^le-fiJhhQmg quite out of ufe,. and Cochmeil and Kermes 
sre by raoft queftioned^whether they are Animals or no 5 bjt I 
thinkjWe may confidently believe them both to be //^/iS/^that 
is. Worms or Chrjjulyis of refp.^ftive Fly's in proxima fietura. 
We find then^and have tried concerning Cochineil (which of it 
felf is red,) that upon theaffufion of the Oyl of Vitriol^that is, 
an-«4r/^Salt,!tftriksthemofl: vivid rri^^ that can be iaiafn<. 
ned^ and with 'Urinous Sdts and Alcal/s^^ it will be again 
changed into anobfcure color 'twiict a violet and a purple. F/i;^/^ 
fomewhere telb us, that the in his ti^oie could dye witii 
VegetableSjWhat the Romans with fo much danger and pains 
fought for in the bottom of the Sea. Indeed, we find many 
Plants mentioned by the fame Author, which either are not 
known^^to us at thisprefent^or neglefSted, 
To what we have briefly obferved out of Authors^, we will 
fubjoynefomeof our own Confiderations and Tryals And firfiy 
concerning the -r^pp^rev^Colours in Flowers, we think we may 
infert 5 !♦ That generally all Red^Blew and White flowers are 
mmediately, upon the afTufion of an z?/^.^/)', changed into a 
Green coIour,and then/in procefs of no long time,turned yel- 
low, 2,. That all the parts of VegetabieSj which are green5. 
will; 
