1. Explain the circumstances upon which the intensity, pitch, and quality of musical sounds depend.

2. Describe some experimental method of finding the number of vibrations per second by which a given note is produced.

3. How can the velocity of sound in air be determined by knowing the length of an organ pipe and the pitch of its fundamental note ?

4. A given note is produced by 240 vibrations. What are the number of vibrations corresponding to its major third, fifth, and octave respectively?

5. Describe some experiment which shows that sound may be refracted.

COLLEGE OF PRECEPTORS.

(Incorporated by Royal Charter.)

1. A corner of a room is formed by two adjoining mirrors. When an object is placed in this corner, three distinct images are formed of it by the two mirrors. Explain the formation of these images by an accurate diagram.

2. Explain, with the help of a sketch, how an ordinary magnifying glass is capable of producing a magnified image of an object held near it.

3. Explain how it is that, when we look through a telescope the reverse way, that is, using the object-glass as eyeglass, objects appear so much smaller, and farther off, than they are in reality.

4. When a little tin is melted in a ladle, the bright metal becomes gradually covered by a film which assumes a succession of colours-yellow, red, and blue. Something similar happens in the tempering of steel. Can you suggest an explanation of these colours?

5. Describe some experiment which proves that light must be propagated by waves.

COLLEGE OF PRECEPTORS.

(Incorporated by Royal Charter.)

PROFESSIONAL PRELIMINARY EXAMINATION.-MARCH, 1882.

THURSDAY, March 9th-Morning, 11 to 1.

EXPERIMENTAL PHYSICS.
Examiner-B. LOEWY, F.R.A.S.

HEAT.

1. A thermometer shows the temperature of a room to be 15° C. It is then dipped into a glass of water, which has been in the room for some time, left there for a few minutes, and taken out again. Are any changes in the reading of the thermometer likely to be observed, (i.) while it is in the water, (ii.) after it has been taken out?

2. By what experiments could you best illustrate the difference between conduction and convection of heat?

3. A tall cylindrical glass vessel, which contains 273 cubic inches of air, is immersed, mouth downwards, in water which has a temperature of 100° C., while the room in which the experiment is made is at 0° C. The cylinder is left in the water until its temperature has fallen to that of the room. Describe, with numerical data, what changes you will observe during the experiment.

4. A man whose weight is 170 lbs. walks up to the top of a hill 1000 feet in height. Explain the principles which enable us to calculate approximately the heat consumed out of his body in doing this.

5. During a heavy gale, about an inch of water got up into the tube of a ship's barometer. What effect will this have upon the indications of the instrument while the vessel sails from London to Australia?

COLLEGE OF PRECEPTORS.

(Incorporated by Royal Charter.)

PROFESSIONAL PRELIMINARY EXAMINATION.

-MARCH, 1882.

THURSDAY, March 9th-Morning, 11 to 1.

EXPERIMENTAL PHYSICS.

Examiner-B. LOEWY, F.R.A.S.

ELECTRICITY AND MAGNETISM.

1. A steel bar is magnetised, and then cut into three pieces of equal length. Describe accurately the magnetic character of each of these three pieces. Will their magnetisation appear equal?

2. State the laws of electrical attraction and repulsion; and describe the fundamental experiments required for proving them.

3. An insulated brass globe is placed near a positively charged conductor. Explain, with the help of a suitable diagram, the electrical state of the globe. How will this state be altered if the globe is touched by the hand?

4. Enumerate the different circumstances which must be taken into consideration in order to estimate the quantity of electricity which flows through a section of a given circuit in a given time.

5. Describe, with a diagram, an arrangement which enables you to prove that two currents which are parallel, either attract or repel one another, according as their direction is the same or contrary.

NATURAL HISTORY.

Examiner—W. H. ALLCHIN, M.B., F.R.C.P., F.R.S.E.

PHYSIOLOGY.

1. What are the essential differences between living and nonliving bodies ?

2. What is meant by the term contractility? Compare this property with that of elasticity.

3. Describe how the food is digested in the stomach.

4. Enumerate the substances that a man throws off during life, and the chief results of the decomposition of the body after death. 5. Explain fully why a man must breathe.

6. Describe what takes place in blood after it has escaped from the body.