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THE work of the advanced class at the Cavendish Laboratory in the department of Heat during the Michaelmas Term, 1884 consisted mainly in the repetition of some of the classical experiments in the subject, using, of course, such models of the original apparatus as the laboratory could provide. It seemed not unlikely that a somewhat detailed account of this work, although not original and therefore not suitable for presentation to a learned society, might yet furnish to students in other Laboratories information of some value respecting the practical difficulties arising, and the effect of neglecting those precautions which it was beyond the power of the Laboratory or of the observer to provide for.
In the hope that this might prove to be the case, I requested the various members of the class to make themselves responsible each for the description of one or more of the experiments comprised in the syllabus. Results had been in most cases obtained during the term by several students, working independently with the same apparatus; such results are always entered in books kept in the Laboratory for the purpose, and it was understood that they were to be incorporated in the account, the different observers being indicated by initials.
It will be seen on reference to the syllabus that the experiments are not all described. With the exception however of No. 6 their arrangement here presented no points of difference from the ordinary descriptions in the books. The apparatus for No. 6 was not completed until so late in the term that there was no time to take observations with it.
The students very kindly undertook the responsibility and wrote the descriptions which are printed below. I have done but little by way of editing; I have however added a few notes where they seemed necessary.
W. N. SHAW.
1. MANUFACTURE AND CALIBRATION OF A MERCURY THERMOMETER.
Maxwell, Heat, Chap. ii.
MS. Kohlrausch, Phys. Meas. p. 58.
Elementary Course, No. 38.
l'Académie, T. XXI. 3. THE WEIGHT THERMOMETER. DETERMINATION OF THE COEFFICIENT
OF EXPANSION OF GLASS.
MS. Regnault (1. c.). 4. COEFFICIENT OF LINEAR EXPANSION OF A ROD.
Elementary Course 1, No. 37. 5. COEFFICIENT OF CUBICAL EXPANSION OF A METAL BY THE AREOMETRIC
MS. Matthiessen, Phil. Trans. 1866. 6. COEFFICIENT OF ABSOLUTE EXPANSION OF MERCURY.
B. Stewart, $ 51.
Regnault, Mémoires de l'Académie, T. XXI. 7. DETERMINATION OF THE TEMPERATURE OF MAXIMUM DENSITY OF
WATER BY JOULE'S METHOD.
Maxwell, Chap. xvii. 8. MANUFACTURE OF AN AIR-THERMOMETER FOR USE AT COMPARATIVELY
MS. 9. MEASUREMENT OF HIGH TEMPERATURES BY THE RESISTANCE OF A
MS. Report of British Association, 1874, p. 242. 10. LAPLACE AND LAVOISIER'S CALORIMETER. MEASUREMENT OF THE
HEAT GENERATED IN AN INCANDESCENT ELECTRIC LAMP.
MS. Maxwell, Chap. iii. 11. BUNSEN'S ICE CALORIMETER. DETERMINATION OF THE SPECIFIC
GRAVITY OF ICE.
MS. Phil. Mag. 1871. 12. FAVRE AND SILBERMANN'S CALORIMETER.
Deschanel, p. 442.
i Glazebrook and Shaw, Practical Physics, $ 36.
13. MEASUREMENT OF HEAT BY THE METHOD OF MIXTURE. DETERMI
NATION OF THE LATENT HEAT OF STEAM,
Elementary Course!, No. 34.
Regnault, Mémoires de l'Académie, T. XXI.
Elementary Course?, No. 35.
Dulong, Ann. de Ch. et Phys. X. p. 399. 15. CLÉMENT AND DÉSORMES' EXPERIMENT ON THE RATIO OF THE SPECIFIC
HEATS OF GASES.
Masson, Ann. de Ch. et de Phys. 3 Ser. LIII. p. 268.
MS. 16. DETERMINATION OF THE SPECIFIC GRAVITY OF A VAPOUR. HoF
Kohlrausch, p. 50; (edit. 1883), p. 55. 17. DETERMINATION OF THE SPECIFIC GRAVITY OF A VAPOUR. DUMAS'
Kohlrausch, p. 45; (edit. 1883), p. 50. 18. DETERMINATION OF THE SPECIFIC GRAVITY OF A VAPOUR. VICTOR
Kohlrausch (edit. 1883), p. 56. 19. MEASUREMENT OF THE SATURATION TENSION OF WATER-VAPOUR IN
Regnault, Mémoires de l'Académie, XXI. p. 481. 20. MEASUREMENT OF THE SATURATION TENSION OF WATER-VAPOUR IN
Elementary Course 3, No. 28.
Cam. Phil. Trans. 1883. 21. DEW-POINT MEASUREMENT. VERIFICATION OF REGNAULT'S FORMULA
FOR THE WET-AND-DRY-BULB THERMOMETERS.
Regnault, Ann. de Chimie. 3 Ser. T. XIV.
Elementary Course", Nos. 29, 30. . 22. COMPARISON OF THE CONDUCTIVITIES OF IRON AND COPPER.
23. EXPERIMENTS ON RADIATION.
B. Stewart, Book II., Chap. i.
1 Practical Physics, $ 39.
2 Ib. § 40.