578 
the Society the best method of making candles 
of resin, or any other substance, fit for common 
use, ata price much Inferior to those made of 
tallow only; the gold medal, or thirty guineas. 
Six pounds at least of the candles so prepared, 
with an account of the process, to be delivered 
to the Society on or before the first Tuesday in 
December, 1802. 
75. METHOD oF SEPARATING SUGAR INA 
SOLID FoaM FRoM TREACLE, To the person who 
shall discover to the Society the best method of 
separating sugar from treacle in a solid form, 
at such an expense as will render it advantage- 
Ous to the:public; the goid medal, or fifty gui- 
neas. A «uantity of the sugar so prepared in a 
solid form, not less than thirty pounds weight, 
with an account of the process, and certificates 
that not less than one hundred weight has been 
prepared, to be produced to the Society on or 
before the first Tuesday in February, 1803. 
76. PROOF-SPIRIT, To the distiller who, 
in the year 1802, shall make the greatest quan- 
tity, not less than one hundred gallons, of a clean 
marketable spirit, from articles not the food of 
man or cattle, equal in strength or quality to the 
proof-spirit now in use, and at a rate not higher 
than the spirit produced from corn or melasses ; 
the gold medal, or one hundred guineas, Ten 
gallons of the spirit, together with proper certifi- 
cates, anda full account of the expense and mode 
of making it, to be produced to the Society on or 
before the first Tuesday in January, 1803. 
77, INCREASING STEAM. To the person who 
shall invent and discover to the Society a me- 
thod, verified by actual experiments, of increas- 
ing the quantity or force of steam, in steam- 
engines, with less fuel than has hitherto been 
employed, provided that in general the whole 
amount of the expenses in using steam-engines 
may be considerably tessened; the gold medal, 
oer thirty guineas. To be communicated to the So- 
ciety on or before the frst Tuesday in Jan. 1803. 
78. SuBsSTITUTE FoR TAR. To the person 
who shal! invent and discover to the Society the 
best substitute for Stockholin tar, equal in all its 
properties to the best of that kind, and prepared 
from materials the produce of Great Britain; the 
gold medal, or one hundred guineas, A quan- 
tity of the substitute, not Jess than one hundred 
weight, with certificates that at least one ton has 
been manufactured, and that it can be afforded 
at a price not exceeding that of the best foreign 
tar, together with an a@cconnt of the process, to 
be delivered to the Society on or before the first 
Tuesday in March, 1803. 
79. PREPARATION OF TAN. . To the person 
who shall prepare in the most concentrated form, 
so as to be easily portable, and at a price appli- 
cable to the purposes ef manufactures, the largest 
quantity, not less than one hundred weight of 
the pr:nciple called by the French tannin, which 
abounds in oak-bark and many other vegetable 
substances; the gold medal, or fifty guineas, 
Certificates of the above quantity having been 
prepared, and a sample of not less than 28 Ib. to 
be pr: duced to the Society on or before the last 
Tueaday in January, 1800. 
Premiums in Chemisiry, Xe. 
[July 1, 
80. PREPARATION OF A SED STAIN FOR 
cotton CLotu. To the person who shall com- 
municate to the Society, the cheapest and most 
effectual method of printing or staining cotton 
cloths with a red colour, by an immediate appli- 
cation of the colouring-matter to the cloth, 
equally beautiful and durable with the red co- 
lours now generally procured from decoctions of 
madder; the gold medal, or thirty guineas. 
Certificates that the above process has been ad- 
vantageously used on ten pieces of callico, each 
twenty-one yards or upwards in length, dne 
piece of the callico so printed, a quart of the co-— 
jour in a liquid state, and a full account of the 
preparation and application, to be produced to 
the Society on or before the second Tuesday in 
January, 1803. 
81. PREPARATION OF A GREEN CoLoUR 
FOR PRINTING COTTON CLoTu. To the person 
who shall communicate to tne Society the best 
and cheapest method of printing with a full 
green colour on cotton cloth, by an immediate 
application of the colouring-matter from a 
wooden block to the cloth, equally beautiful and 
durable as the colours now formed from the 
complicated process of the decoction of weld 
on alumine and the solutions of indigo by earths 
or alcaline salts; the gold medal, or thirty gui- 
neas, Certificates and conditions as for premium 
30. 
82. SUBSTITUTE FOR THE BAsis OF PAINT. 
To the person who shall produce to the Society 
the best substitute, superior to any hitherte 
known, for the basis of paint, equally proper for 
the purpose as the white lead now employed ; 
such substitute not to be of a noxious quality, and 
to be afforded at a price not materially higher 
than that of white lead; the gold medal, or one 
hundred guineas, A quantity of the substitute, 
not less than 50 lb. weight, with an account of 
the process used in preparing it, and cerézficates 
that at least one hundred weight has been manu- 
factured, to be produced to the Society on or be- 
fore the first Tuesday in January, 1803. 
83. Rep PicMENT, To the person who shall 
discover to the Society a full and satisfactory 
process for preparing a red pigment, fit for use, 
in oil or water, equal in tone and brilliancy to 
the best carmines and lakes now known or in 
use, and perfectly durable; the gold medal, or © 
thirty guineas. One pound weight of such co- 
lour, and a full disclosure of its preparation, to 
be produced to the Society on or before the first 
Tuesday in February, 1803. 
N, 2B, Itis not required that the colour should 
resist the action of fire or chemical applications, _ 
but remain unaltered by the common‘exposure 
to strong light, damps, and noisome vapours, 
84. ULTRAMARINE. To the person wha 
shall prepare an artificial ultramarine, equal in 
colour, brilliancy, or durability, to the best pre~ 
- pared from lapis lazuli, and which may be afford 
ed at acheap rate; the gold medal, or thirty _ 
guineas. The conditions are the same as in the 
preceding premium for the red pigment. - 
85. ANALYsIs oF British MiNnERALS. To 
the person who shall communicate to the Soctety, 
