248 SURVEY OF THE COAST 



17. One iron metre, standarded by Lenoir. 



18. One iron tool for filing off bars, perpendicularly to 

 their length, by a rotatory motion. 



19. Ont* iron plane. 



20. One strong very fine balance, with English weights, 

 from 10,000 grains to decimals of grains, standarded by Mr. 

 Trough ton. 



21. Two subdivided kilograms, in the form of parallele- 

 pipedons, standarded by Fortin in Paris, who was employed 

 by the Committee of Weights and Measures in making the 

 originals. 



23. Two standard litres, with covers of ground plate 

 glass, standarded by Fortin. 



23. Two transit instruments for observatories, with five 

 feet telescopes, made by Mr. Troughton. 



24. Two as'ronomical clocks for the observatories, with 

 mercuiial compensation pendulums, made by William Har- 

 dy in London, on the same plan as that of the Greenwich 

 observatory. 



25. Two box chronometers, going one day, with silver 

 dials, and corrections for short and long vibrations, made by 

 the same. 



26. One box cin-onometer, going two days, by Mr. Brock- 

 bank. 



27. Two box chronometers, going only one day, by the 

 same. 



SS. Two silver pocket chronometers, by the same. 



29. One box chronometer, l)y Grimaldi and Johnson. 



30. Two tin»e pieces, shewing the three hundredth part 

 of a second by a hand attached to the balance, made by Mr. 

 Hardy. 



31. One six feet achromatic telesco|)e of Dollond, with a 

 four and a hall' inch apeiture, one terrestial and six astro- 

 n* mieal eyepieces, a finder, the tube in three parts screwed 

 together, and a mahogany stand in two parts. 



33. One five feet achromatic telescope, with a four inch 

 aperture, one terrestrial and six astronomical eye tubes, brass 



