234 W. Lauder Lindsay’s Laperiments on the 
: TABLE | 
Showing the effects of various Solvents and Reagents — 
Roccella tinctoria. 
N peolni Period: «| es) Ne 
St oe ores a oe of Macera- : : ; , 
Reagent. nee Thin rad from nee ee, from i 
I. WaterR—common spring—cold| 14 days |Very pale sherry* |Dirty brownish-red 4 
at temperature of 80°} 10 days |Light claret Light Claret 
120° on days Deeper claret 
Boiling 4 hour |Dirty brownish-red Dirty claret colour 
... Distilled—cold 10 days |Pale sherry Pale sherry colour 
II. Atconox [Spirits of wine]. | 10 days |Unaltered Unaltered 
III. ArkaLties— 
Ammonia 
Liquor—strong 3 days |Lt. crimson-purple /Rich crimson-purple | — 
— dilute 10 days |Deep pbs: Rich deep purple | 
Carbonate—solution, 2 grs.t| 14 days 
ee ee ae Ae days |Pale brownish-red _|Pale sherry 
— cold 
— sol. at temp. of 80° 7 days |Deeper brownish-red |Light claret 
PoTasH 
Aq. potassee— 
— strong 3 days |Light claret Deep claret 
— dilute 10 days 
Acetate, 2 grs. 14 days |Pale sherry Very light label 
Bitartrate, 3 grs. 14 days |Very pale sherry Pale sherry 
Carbonate, 2 grs. 14. days |Brownish-red Deep claret | 
Iodide of potassium, 2 grs.| 14 days |Very light red Light brownish-red — | 
Nitrate, 5 grs. 14 days |Pale brownish-red |Brownish-red | 
Prussiate, 2 grs. 14 days |Unaltered Unaltered 
Sulphate, 2 grs. 14 days |Nearly unaltered Nearly unaltered 
Sopa— 
Bicarbonate, 2 grs. 14 days |Light brownish-red [Deep sherry 
Biborate (borax), 2 grs. 14 days hale 
Garbonate, 4 grs. 14 days |Cherry red. Deep claret | 
Chloride of sodium, 5 grs.| 14 days |Pale sherry Pale sherry 
Phosphate, 2 grs, 14 days |Pale sherry Light prownish-red | | 
ALKALINE Eartus— 
Baryta—nitrate, 2 grs. | 14 days |Very light br.-red 
ee be ti ee 14 days |Light sherry Light purple-red 
— boiling 1 hour |Dirty sherry Deep purple-red 
— at temp. of 80° 7 days Rich purple-red 
Chloride of calcium, 2 grs.| 14 dni Light brownish-red Light brownish-red | 
* I have been somewhat embarrassed in the naming of these colours. I endeavoured to arrange 
very different from that in common use. 
+ The number of grains appended to this and other salts signifies the proportion in which the 
