370 QUEENSLAND AGRICULTURAL JOURNAL. {1 Noy., 1902. 
Agricultural Patents. 
PATENTS ACCEPTED. 
Carrie Foon anp Manure rrom Yeast anp Spent Hops.—- Classes 33, 
36, 82 (No Drawings)— 6525: William,Wardle, of 6 Scalpeliff road, Burton- 
on-Trent, Stafford, England, manager. ‘‘Improved Method of Preparing 
Yeast for Use in the Manufacture of Food or Manure.’ Dated 18th March, 
1902. (Drawings, nil; specification, 4s. Gd.) In utilising brewers’ surplus 
yeast and spent hops, this modification of the usual process consists in 
pulverising or grinding the dry sweet spent hops to a mash before mixing with 
as much yeast as they will absorb; the mixture is piled in heaps for four to 
five days, and is occasionally turned over until the fermentation ceases, 
after which it is quickly kiln-dried, and may be used as cattle food, either 
alone or in conjunction with other foods. The product may also be used as 
manure. " (2 claims.) 
Liqurp SEALS (AFTERWARDS SOLIDIFIED) FoR Cans.—Classes 32, 76 
(14 Figures)—6529: Valves, Limited, of Suffolk House, Laurence Pountney 
Hill, London, England, manufacturers (assignees of John Radcliffe Croft, of 
20 Mark lane, London, England, merchant). “ Improvements in the Hermetic 
Sealing of Tins and like receptacles.” Dated 21st March, 1902. (Drawings, 
20s. ; specification, 22s. 6d.) To prevent the admission of any small quantity of 
air (possibly not sterilized) during the sealing of the final closure of food cans, 
the finally closed hole is made at the bottom of a depression in which the 
molten solder (or wax) acts as a liquid seal, allowing expanding air from the 
interior to pass out, but preventing the ingress of external air. ‘Io prevent the 
liquid solder being forced inwards by the external pressure, a fusible solder (or 
wax) is selected that melts very near the temperature of closure, so that a very 
slight reduction of temperature solidifies the solder; and to the same end the 
hole is backed with a pad of filter-paper (or porous material) which prevents 
the solder being entirely forced inside before solidification. Many forms of the 
joint are illustrated in which the porous pad is placed between layers of sheet 
metal, stamped into convenient annular corrugations, with perforations or 
openings on ridges internal to the pad ; in some cases an extra outer pad and 
perforated cover is added; in others the two Pace with a pad between are 
separately formed and attached to the cover of the can by a less fusible solder, 
For retort cooking, the vent solder may fuse at about 240 degrees Fahr.; for 
water bath cooking, fusible metal smelting at 180 degrees to 212 degrees Fahr. 
is suitable; whilst for cold vacuum sealing, paraffin wax or the lke may be 
used, and optionally a guard cover may be afterwards soldered above the wax 
seal, or a perforated guard may be attached before sealing. (6 claims.) 
Warer Bac Sare.—Class 34 (8 Figures)—6271: Walter Skelton, of 
the Broadway, Dunolly, Victoria, Australia, importer. ‘‘ Improvements in a 
Combination Water Bag and Extension Cool Chamber or Chambers.” Dated 
14th October, 1901. (Drawings, 5s.; specification, 6s. 6d.) In water cooler 
bags combining storage chambers similar to specifications Nos. 5421 and 6356 
in which a cylindrical or rectangular bag has horizontal partitions dividing the 
vertical length into compartments, one of which holds water and the other has a 
doorway and flap cover tor the insertion of provisions, &c. Hither the upper or 
lower compartment may be the safe, or there may be two partitions with water 
between and storage above and below. In Fig. 1 the lower compartment has a 
metal roof; in Fig. 2 the lower compartment holds the water and is filled 
through a side opening; and in Fig. 3 the jacket is double, so that the cooled 
water surrounds the safe except at the door. (38 claims.) _ 
