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ROYAL COLLEGE OF SURGEONS OF

ENGLAND.

PRELIMINARY GENERAL EXAMINATION.-Midsummer, 1865.

THURSDAY, June 22nd.-Morning, 12 to 1.

CHEMISTRY.

Examiner.-PROFESSOR REDWOOD.

1. Describe the characters and properties of Nitrogen, and give a process by which it may be obtained in an isolated state.

2. What is the composition of Carbonic Acid, and how would you distinguish it from Nitrogen ?

3. How may the presence of large quantities of Carbonic Acid

in the air be detected?

4. What are the principal products of the combustion of Coal-gas ?

5. Explain what occurs in the slaking of lime, and state the cause of the heat produced in the process.

6. What is the acid contained in lemon-juice, and how may this acid be obtained in a separate and pure state?

ENGLAND.

PRELIMINARY GENERAL EXAMINATION.-Midsummer, 1865.

THURSDAY, June 22nd.—Afternoon, 24 to 4.

MECHANICS.

Examiner.-W. J. REYNOLDS, ESQ., M.A.

1. Explain the terms component pressures, resultant pressure. Enunciate the proposition known as the parallelogram of pressures.

2. A lever 5 feet long "balances" horizontally, with no weights suspended from it, on a fulcrum 2 feet from one end. Will it so balance when 2 ounces are hung at the end of the longer arm, 3 ounces at the middle of the lever, and 5 ounces at the end of the shorter arm? Give the reason of your answer.

3. Explain the mechanical advantage of moveable pulleys.

A boy weighing 60 lbs. makes a swing by tying one end of a cord to a smooth horizontal bar, and then throwing the cord over the bar so as to form a loop in which he sits (with his feet off the ground), while he holds the hanging end of the cord in his hand. Determine the tension of the cord.

4. Define the term Centre of Gravity.

Explain the reason why the feat of touching the toes with the fingers without bending the knees cannot be performed by one who attempts it with his heels in contact with a vertical wall. 5. Define the terms uniform motion, uniformly accelerated motion.

A body moved from rest 6 seconds ago, with a motion uniformly accelerated. At the end of 1" its velocity was 6 feet per second. Determine the distance it has passed over, and the velocity it has acquired.

6. Enunciate the three Laws of Motion. Apply them respectively in the three problems below, to determine the positions and velocities of the bodies under the hypothetical circumstances described, at the end of 1" after the instant named in each problem.

A body resting on a perfectly smooth horizontal plane is acted on horizontally during 1" by a force which in Î′′ generates a velocity of 32, and which ceases to act at the instant when the 1" ends.

A body is projected horizontally, with a velocity of 40, from the top of a tower of such a height that a body dropped at the same instant would have struck the horizontal plane at the base of the tower in 1".

A man weighing 168 lbs. is pulling horizontally with a pressure of 350 lbs. by a cord without weight and 100 feet long at a body weighing 2240 lbs., at the instant when the horizontal plane on which both are resting becomes perfectly smooth.

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