awarded first-class mention for a great improvement in bandsaw machinery (Knowling's patent). The great peculiarity of this machine is that the standard moves, altering the angle of the saw, whilst the table maintains a horizontal position. This allows of timber being cut at any angle. The saw can be canted to an angle of 45 degrees. The table is fitted on rollers to follow the saw; hence the saw does not drag the timber along the table, as is the case with most band-saw machines. The main frame has trunnions at its base, is journalled in the foundation-frame, and is moved by a screw underneath the table, worked by a hand-wheel, which cants the screw and moves the table at one and the same time. Another important feature in this machine is the way in which the top saw-wheel is bracketed to the standard, by means of a pivot, and supported by indiarubber tensionsprings. The adjustment by a hand-screw is very sensitive. The arrangement for adjusting the plane of the upper bandpulley, so as to make it coincident with the lower one, is simple and good. Any small obstacle getting between the saw and the pulleys does not break the saw. The machine is made in three sizes, and was catalogued as follows:

Messrs. Nalder and Nalder, Limited, have introduced into this country a much-desired combination, viz., a portable combined threshing and straw-elevating machine. Something of the same arrangement has been used in America, but only, as far as I know, capable of delivering the straw in the same direction as that in which the machine stands, whereas this can be worked with equal effect at any angle. Moreover, the frame of the elevator is so jointed that it can be folded very snugly for travelling. The following illustrations (Fig. 28)-showing 1, the machine as fixed for work; and 2, as packed up for travelling-will give an idea of the appearance, and assist the reader to understand the means by which this desirable result is obtained.

The elevator is affixed on the straw-delivery end of the threshing-machine, being mounted on a horizontal axis, which allows the delivery-end of the trough to be raised or lowered, and on a vertical axis, admitting of a lateral or side-motion; and the

apparatus is so constructed that the operation of raising or lowering the trough, or of adjusting it laterally, can proceed whilst the elevator is in motion. It will be seen by reference to Fig. 28, that a table or platform is attached to the main frame of the threshing-machine. The upper portion of this table is mounted, so as to be capable of rotation, or partial rotation, on a pivot. The lower end of the elevating trough is hinged to the upper portion of the platform in such a manner that the trough can be raised or lowered, the means of actuating the trough being a crane or winch fixed to the upper frame of the threshing-machine, with suitable pulleys, over which a rope or chain, wound at one end on the drum of the crane, and attached at its other end to other ropes or chains attached to the delivery-end of the trough. The rotation of the elevator is effected by means of a worm and worm-wheel. The endless web and chain of the elevator are driven by a pair of spur-wheels on the end of an upright shaft, to which motion is communicated by pulleys and belts from the threshing-machine, the arrangement being well shown in Fig. 28. In order to ensure stability in any required position, adjustable props may be used, one of which is shown in Fig. 28. In order to facilitate the packing up of the elevating trough the sides are detachable. The regulations of the Society preclude the awarding of medals without an adequate trial, for which there was no opportunity at Kilburn, otherwise I think the merits of this invention or combination might have justified such a distinction. The advantages claimed by the patentees are:-1. Saving of labour, inasmuch as the straw can be delivered in any position, or waggons may be loaded without stopping the machine. 2. Saving of time in starting machinery, as there is no time spent in fixing and setting the elevator. 3. Saving of power, owing to a peculiar arrangement of the prongs or tines, which are separately attached to each belt. 4. Saving of horse-power in removing from place to place, and of an extra attendant. The additional weight of the attached elevator is under half a ton, whereas an ordinary elevator weighs from 25 to 30 cwt. 5. Equal advantage when the implement is drawn by a traction-engine. 6. Greater facilities for working in a barn. 7. Saving of shed-room when stored. The price of the elevator varies from 40l. to 451., according as it is attached to medium or large-sized machines. Its addition to old machines of Messrs. Nalders' make involves an additional charge of 51.

Messrs. Christy and Co.'s incubator has been already noticed.

2. Second-Class Mention.

No. in Catalogue.

4131 M. François L'Heron, for Agricultural Barrow.

6927 Pulsometer Engineering Company, for Centrifugal Grinding and Sifting Mill.

7368 Messrs. Entwisle and Kenyon, for Riley's Patent Engineer's Vice. 9056 Messrs. Everett, Adams, and Co., for Patent Double-row Turnip Thinner.

9144 M. Nicolas Noel, for Valve attached to Pump.

9714 Mr. Thomas Adams, for Patent Spring Safety-Valve.

Messrs. J. Sabatier and Co., of Bread Street Hill, London, showed M. François L'Heron's universal barrow, for which are claimed special advantages. The shafts are high, and therefore the workman is not obliged to stoop. Part of the load bearing directly on the wheel, some considerable portion of the weight, said by the inventors to be 30 per cent., is thus saved. When unloading, the load is thrown forward over the wheel, and the load automatically opens the front flap, and is discharged, thus saving the trouble of turning the barrow over on one side, which is dangerous, and likewise requires more room. This article was not entered in the catalogue, and therefore I have no knowledge of the relative cost. That there is some advantage in the position of the load over the wheel and the mode of discharging is evident; and if equal strength without undue cost is obtained, this is a creditable invention.

The Pulsometer Engineering Company, of Queen Victoria Street, London, exhibited a complete novelty in their comminutor (Thompson's patent), a centrifugal grinding and sifting mill. The nature of the machine will be understood by reference to the sectional view (Fig. 29, p. 736).

The grinding is effected by the centrifugal action of the ball, which revolves with the spindle, and the revolutions of the discs. The spindle, which is driven at a high speed, when rotating carries with it the discs and the ball. The material to be ground or pulverized is placed in the external hopper, seen on the left side of the section, and fed from thence according to its nature, and by a controllable feed, into the cups of an annular elevator, by which it is raised and discharged into the internal hopper, from which it falls into the mill by double apertures; It is first crushed by the rapid blows of the ball, which freely exerts its centrifugal force upon the materials under operation; and by means of a simple rolling motion kept up by the discs the whole becomes rapidly pulverized, and is then, through the fans of each disc, raised out of the mill and falls into the sieve, through the meshes of which the fine flour escapes, whilst the coarser materials are brought back to the elevator, to be again