for their invention of certain improvements in machinery for combing or clearing sheep's wool and goat's hair.-Sealed 23rd May-6 months for inrolment.

To Elijah Leak, of Hanley, in the parish of Stoke, and county of Stafford, engineer and lathe maker, for his invention of certain improvements in the construction of shutters and sashes for windows of buildings, which improvements are also applicable to hot-houses or conservatories, carriages, and other purposes, and in the mode of fitting or using the same.-Sealed 23rd May-6 months for inrolment.

To Charles Pierre Devaux, of Fenchurch-street, in the city of London, merchant, for a new or improved apparatus for preventing the explosion of boilers or generators of steam, being a communication from a foreigner residing abroad.-Sealed 23rd May-6 months for inrolment.

To Baron Henry de Bode, Major-general in the Russian service, of the Edgeware-road, in the county of Middlesex, for his invention of improvements in ap paratus for retarding and stopping chain or other cables or ropes on board ships or vessels.-Sealed 23rd May6 months for inrolment.

To Charles Joseph Freeman, of Frederick's-place, Kennington-lane, in the county of Surrey, gentleman, for his invention of an improvement or improvements in the machinery or apparatus called rolls, for rolling iron or other metals, applicable to rails for roads, and bars of various shapes for other purposes.-Sealed 25th May-6 months for inrolment.

234

57

31

29,83 29,74

29,65 29,57,0125 13 59

29,53 29,31,025 14 59 28 29,86 29,73,05 29,51 29,35,1625 15 54 36 30,07 29,95,05

27 29,77 29,76

,1

37 30,24 30,20,0125

61 41 29,73 29,61 ,05

17

70

29 30,23 30,13

18

55 40 30,12 30,10

19

53 32 30,04 30,01,025

64 39 29,77 29,65

61 37 29,86 29,73

60 34

58

30,00 29,92

26 30,07 30,04

59 25 30,02 29,92

8 53 35

29,82 29,66,025

20 53 28 29,95 29,86,025

21

22

23

24

25

Edmonton.

CHARLES HENRY ADAMS.

Latitude 510 37 32 N.

Longitude 3 51 West of Greenwich.

The eclipses of the Satellites of Jupiter are not visible at Greenwich during this month.

THE

London

JOURNAL AND REPERTORY

OF

Arts, Sciences, and Manufactures.

CONJOINED SERIES.

No. LXIV.

Recent Patents.

To JOHN M'DOWALL, of Johnstone, in the county of Renfrew, North Britain, and of Manchester, in the county of Lancaster, engineer, for his invention of certain improvements in machinery for sawing timber, and in the mode of applying power to the same.[Sealed 24th June, 1836.]

THIS invention consists, firstly, in an improved construction or arrangement of machinery for sawing and cutting timber into planks or boards; secondly, in a modification of the same, suited to the sawing or cutting of balks or logs of heavy timber into scantlings or boards; thirdly, in the adaptation of a steam cylinder and piston to each of the said cutting frames, for the purpose of independently driving its machinery. By this arrangement each sawing frame is converted 2 c

VOL. X.

into a separate engine, is perfectly distinct from the adjoining sawing frames, is capable of being worked or stopped at the pleasure of the operator, without affecting any other of the said frames contiguous to it, and by this may be driven faster or slower than the others, as the qualities or natures of the various kinds of timber under operation may require.

These improved machines may be used (when not employed in cutting) as ordinary steam-engines, for driving other machinery by various modes, as placing a pulley on the main driving shaft of the engine, which, by having a strap passed round it, may either be made to drive circular saws, or for other light works.

In case of this improved arrangement of sawing machinery being constructed without the steam cylinder and piston, it may be actuated by an ordinary stationary steam-engine, there being a fast and loose pulley mounted upon the main shaft, and a strap leading from the actuating part of such station engine may be connected to the said driving pulley.

In order that these improvements may be clearly understood, have I attached to this specification drawings, exhibiting the machinery in complete elevation and sectional views; and I have marked the same with several letters of reference, which respectively point out similar parts in all the figures.

Plate X., figs. 1, 2, and 3, represent the "saw-frame,” intended to be employed to saw or cut "deals" or small timber into such boards or planks as may be required. Figs. 4, 5, and 6, exhibit the " balk frame,” or that which is proposed to be employed for cutting or sawing heavy balks or logs of timber into planks or thicknesses called "scantlings" or boards.

Fig. 1, represents a front elevation of the improved