List of New Patents. 75 
of 220° until it ceased to lose weight. 100 grains, heated to 
redness in a tube, gave off nearly 8 grains of water, and as- 
sumed the orange-colour of litharge: the recently precipitated 
oxide was no doubt, therefore, an hydrate; part of which, with 
somewhat less than two parts of olive oil, without any addi- 
tion of water, at a temperature of 212°, formed, in half an 
hour, perfect plaster. Each of these experiments has been 
repeated with precisely the same results. I am induced to 
mention this fact, because all pharmaceutical writers limit the 
action of the water to that of keeping down the temperature. 
H.H.—Journal of Science, 
LIST OF NEW PATENTS. 
To John M‘Curdy, of Cecil-street, Strand, esquire, for. improvements 
in generating steam.—Dated 27th Dec. 1825.—6 months to enrol specifi- 
cation. 
To James Ogston and James Thomas Bell, of Davies-street, Berkley- 
square, watchmakers, for improvements in the construction or manufac- 
ture of watches, communicated from abroad.—6th January, 1826.—2 
months. 
To Richard Evans, of Bread-street and Queen-street, Cheapside, for 
improvements in the apparatus for and process of distillation,— 7th Jan.— 
6 months, 
To Henry Houldsworth junior, of Manchester, for improvements in 
machinery for giving the taking-up or winding-on motion to spools or 
bobbins; &c. on which the roving or thread is wound in roving, spinning, 
and twisting machines,—16th Jan.—6 months. 
To Benjamin Newmarch, of Cheltenham, esquire, for his improved me- 
thod of exploding: fire-arms. — 16th Jan.—6 months. 
To John Rothwell, of Manchester, tape-manufacturer, for his improved 
heald or harness for weaving purposes.—16th Jan.—-2 months, 
To Henry Anthony Koymans, of Warnford-court, Throgmorton-street, 
for improvements, communicated from abroad, in the construction and use 
of apparatus and works for inland navigation.— 16th Jan.—6 months. 
To John Frederick Smith, of Dunston Hall, Chesterfield, Derbyshire, 
esquire, for an improvement in drawing, roving, spinning and doubling 
wool, cotton, &c.—19th Jan.—6 months. 
To William Whitfield, of Birmingham, for improvements in making of 
handles for saucepans, kettles, &c.—19th Jan.—6 months. 
To Benjamin Cook, of Birmingham, brass-founder, for improvements in 
making hinges.—19th Jan.—6 months, 
To Abraham Robert Loreut, of Gottenburg, Sweden, merchant, at pre- 
sent residing in King-street, Cheapside, for a method of applying steam 
without pressure to pans, boilers, coppers, stills, pipes, and machinery, in 
order to producé, transmit, and regulate various temperatures of heat in 
the processes of boiling, distilling, evaporating, inspissating, drying, and 
warming, and also to produce power.—19th Jan.—6 months, 
To Sir Robert Seppings, knight, a commissioner and surveyor of the navy, 
of Somerset House, for his improved construction of such masts and bow- 
sprits as are generally known.—19th Jan.—2 months. 
To Robert Stephenson, of Bridge Town, Stratford, Warwickshire, en- 
gineer, for axletrees to remedy the extra friction on curves to carriages used 
on rail-roads, train-ways, and other public roads.—23d Jan.—6 months. 
K Summaries 
