ened to the top board of the reservoir L, and the other From this weight end being attached to the weight, c. another line passes over the pully, d, and the end of it is fixed to the rod, e, which has a stop piece, f, at the bottom, working against the edge of the fly wheel, 8, [also 8 in figures 7, 8,]. Now it is evident that as the reservoir L rises, the weight, c, descends, and as the weight descends, it pulls up the rod stop e, f, which working against a part of the frame work of the organ, g, jams or impinges against the edge of the fly, 8, and immediately stops it. It is also evident that as the reservoir L sinks, the weight, c, rises, and the rod stop, e, f, being left free, falls down by its own gravity, and releasing the fly wheel 8, the machinery commences working; and is thus made a perfect regulator of its own movements and never permits the bellows to be overblown. The reservoir in fact, if I may speak figuratively, takes care of itself, setting the bellows to work as soon as it requires a supply of air, and stopping them as soon as it has obtained it.

15.-As it is necessary in an organ of this nature to be able to stop it at pleasure when playing, and as this Instrument has two separate pieces of machinery distant and distinct from each other, it was requisite to contrive some easy means of stopping both motions at once; and this was effected in the following manner.

16. Let the upper portion of figure 9, represent a part of the mechanism of C in figure 1, i. e. of the organ barrel movement-x, y, represent the fly [which carries wings and is not like the fly wheel for the bellows] the line, x; being a circular disk of thin brass:-w, is a spring with a rubber of leather at the end, pressing, when the spring is released, on the disk xs.-u, is a rod attached to the spring, which is lifted or depressed by means of the excentric wheel t. Now the action of this arrangement excentric wheel, t, is turned in the

is, that when the

direction of the dart (which is done by a thumb-screw fixed on the end of its axle) the spring, w, is let down on the disk, x, and stops the motion of the fly, and consequently of the barrel movement.-At the same time the lever, s, which is fixed on the axis of the excentric, is lifted up, and the line, k, having one end fastened to the lever, s, and the other end to the stop rod, e, f, and passing over the pullies, r, q, being also lifted or pulled up by the lever, the stop rod, e, f, is raised, and acts on the fly wheel 8, stopping both movements simultaneously.

17.-I proceed in the last place to describe the method of striking the bell, or giving notice when the weights E, F, figure 1, have been wound up high enough. Let, h, in figure 10, represent a pin fixed on one of the weights so as to come in contact with the end of the square elbow e, d, f.-Now as the elbow moves on a centre at, e, the effect is that the point, f, is lifted up as the weight rises, and the hammer, b, is thrown into the position, b*, shown by the dotted line: but when the weight has risen as high as, f*, the pin, h, is clear of the elbow, which being suddenly left free falls back by the pressure of the spring s, into the situation shown in the sketch, and causes the hammer, b, to strike a single blow on the bell, a, indicating that the weight has risen high enough, and that the winding should cease:-But as the movement is for the weight as it ascends, and is not required as it descends, and as the projecting point, f, would, as the weight sinks, be in the way; f, is made moveable on a centre at, g, shown by a dot; so that acted on from above the small piece, g, f, moves on its own from the centre, e, of the fixed upon the elbow, and ratus to move when acted pin or weight ascends. own centre, g, when the course allows the pin to slide

centre, which is different elbow piece: but it is causes the whole appaon from below as the Thus being moveable on its weight goes down, it of down quietly without act

ing on the elbow, or causing any motion so as to occasion an unnecessary blow upon the bell.

18.-I shall reserve the manner of putting the music on the barrels for the next number of the Journal.

10th September 1835.

(Concluded from No. 8.)

J. BRADDOCK.

V.-Biographical Sketch of the Literary Career of the late Colonel COLIN MACKENZIE, Surveyor-General of India; comprising some particulars of his Collection of Manuscripts, Plans, Coins, Drawings, Sculptures, &c. illustrative of the Antiquities, History, Geography, Laws, Institutions, and Manners, of the Ancient Hindús; contained in a letter addressed by him to the Right Hon. Sir ALEXANDER JOHNSTON, V.P.R.A.S. &c. &c.

(Extracted from the Journal of the Royal Asiatic Society, Vol. 1. Page 333.)

A.

A General View of the Results of Investigations into Geography, History, Antiquities, and Literature, in the Island of Java.

I. CHARTS, GEOGRAPHICAL AND HYDROGRAPHICAL. In the geographical and hydrographical branches, complete registers have been taken of the numerous atlases, plans, charts, and memoirs belonging to the Dutch government, since its establishment from 1612 till the year 1811. Among these are to be found detailed regular surveys of several of the eastern provinces, on a plan which I have recommended to our government in Java to be gradually carried on at no great expense. This will be the subject of a particular report, which I propose to accompany with a detailed register of these

* This register was presented to the government at Fort William of the 18th February, 1 815.

documents, and charts of different descriptions, supposed to be in depôt with the present government.

II. MILITARY.

Of military plans numerous pieces exist still, though some of them, particularly connected with the views of the late government, are unattainable, and supposed to be lost in the confusion attending the victory and retreat of CORNELIS; those remaining appear in the register. There is reason to think that much of the contents of the depôts at the Bureau de Génie, and that of military movements, were lost at the period referred to, or carried off.

III. TERRITORIAL.

Of the resources and revenues of the island, the whole, it is believed, are saved of the numerous memoirs, reports, and productions arising from the discussions and plans of reform of late years, where the opinions and sentiments of the most intelligent and experienced men in India and Holland are to be foundthe result of their reasoning, with a vast body of information in memoirs, reports, and documents, in the depôts of archives which, previous to the late government of Marshal DAENDELS, were preserved on a regular systematic plan the indexes, or rather abstracts of the proceedings and resolutions of the government from its first establishment, were particularly curious; under the heads Realia, Secret Realia, Personalia, and Miscel

:

* The whole of the voluminous minutes, correspondence, and proceedings of the commission sent from Holland in 1793, of which Mr. MEDENBURG was president, and which terminated in 1800, are deposited in a great almyra or cabinet. Mr. MEDENBURG afterwards returned to Holland, and was one of the leading members of the Secret Committee on India affairs that sat at the Hague, whose final report in 1807 seems to have been the basis on which the plans adopted by the late government of Holland for their oriental colonies were founded.

lanea, reference might be made with ease to any subject that had ever occupied the deliberations and orders of government. There is reason to believe the Miscellanea, consisting of eight volumes, were lost; at least they could not be found on inquiry since the reduction of Java.

2. The reports of the committee of archives, translations of which, it is believed, have been sent to India, will fully explain the number and description. Colonel MACKENZIE, confining himself more particularly to the geographical and hydrographical parts, has only brought copies of the reports relating to them, and of the regis. ter of reports and memoirs from the dependencies, particularly as regards India.

3. Memoirs or Reports in succession of the Governors and Directors of the Dependencies in India.-It may be proper here to notice, that in the course of inspection of the archives and library of the late government, he casually lighted on a series of memoirs or reports of the Dutch governors and directors in Koromandel from 1612 to 1771, carried regularly on from one governor or director to another. One of the most material to us is a collection or register of all treaties, contracts, parwánas, and grants between the Dutch government and the native powers of the south of India; a copy of this volume was taken, as it was conceived to be useful in fixing dates, facts, privileges, and claims. The other volumes, besides the instructions of the first governors, give a view of the nature of the commerce, and concise views of the political state of the different countries at the time, though not all equally interesting; as the memoirs or reports of the governors or direc

This is one of the works translated at Serampore since January last, and sent to government April 1816.