for ten minutes is cooled and the flask is filled to the brim with it. The tube is inserted in the cork so as barely to reach through it. The cork is now inserted in the flask when water will rise a short way in the tube. It should stand only an inch or two above the cork. If it stands too high the cork should be removed and replaced less water being introduced into the flask. Absolutely no air must be inclosed. On heat ing the flask the water will very slowly rise in the tube as the heat expands it. The minor point of boiling the water should be at tended t as the effect is much better and the demon stration is a true one when no bubbles are discernible. The same flask and tube may be used to show the expansion of gases. It is emptied and inverted with the end of the tube under water. On heating the flask with a lamp the air expands and escapes in bub bles from the end of the tube. On removing the source of heat the water rises into the tube and perhaps into the flask owing to the contraction of the air as it cools. TEE RHINOCEROS IN THE PARK. Bohu came to the Park only a short while ag and is of that kind of rhinoceros which has two horns. Those of Asia have only one horn and their skin lies in thick folds and segments in shape like that of the armadillo. or are they by any means so rare as the one we have in the Park. As will be seen by the pic upper lip of this strange beast is much larger than the under one. It is prehensile that is to say it can be made to curl about a branch or a wisp of straw like the end of an elephant's trunk and with quite as much ease. Bohu is in the lion house and at one end of it. The hippopotamus is at the other. This gives those who like to study animal life a fine chance to compare two rare forms often mistaken the one for the other. The last named as will be seen by a visit to the Park looks like a great hog in more ways than one. He has a blunt snout short thick legs knows no such thing as grace when he moves and to wallow is his
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