absorbed animals arrowroot become black-board blood body boiling bone bottle bread Bunsen burner burning Call attention camphor carbonic acid class tell class to tell clothing cocoa cold colour contains cool cord cotton dissolved earlier lessons fibres fire flame flask flesh-forming force fruit fulcrum gases gluten hair heat heat-giving Hence hydrochloric acid hydrogen inch incisors inclined plane iron kind known Lead the children Lead the class leaves length lever liquid maize manufacture material mechanical advantage mercury metal mineral matter molecules ossein oxygen particles pass phosphorus piece piston plant power-arm properties pulley quantity radiators raise round salt seeds side skin solid specimens starch steam substance sugar sulphur surface teeth temperature thick threads tissue-forming tree tube turpentine upwards vapour vegetable vertebræ vessel warm weight weight-arm wheaten flour wheel wool
Page 238 - The upper chambers are called the RIGHT AND LEFT AURICLES; the lower, the RIGHT AND LEFT VENTRICLES. THE HEART IS REALLY A DOUBLE ORGAN, CONSISTING OF TWO COMPLETE HEARTS. There is a passage between the upper and lower chamber on each side so that whatever is in the auricle can pass through into the ventricle below; but there is no direct communication between the right and left sides of the heart. Make a diagram on the blackboard showing these four chambers of the heart.
Page 51 - ... water But as, from the conditions of the experiment, they have each been receiving the same amount of heat, it is clear that the quantity of heat which is sufficient to raise the temperature of mercury through a certain number of degrees will raise the...
Page 247 - ... the chamber, the lungs must expand or contract with them in order to accommodate themselves to the space provided. The back of the mouth and the nasal passages open into a large cavity, the pharynx, and from the lower part of this a long, stout tube, the windpipe, extends downwards into the chest. This pipe, which is formed of stout rings of gristle, can be felt. The rings make it hard and resisting to the touch, and prevent it from collapsing with pressure. After entering the chest the windpipe...
Page ix - Matter in three states; solids, liquids, and gases. Mechanical properties peculiar to each state. Matter is porous, compressible, elastic. Measurement as practised by mechanics. Measures of length, time, velocity, and space.
Page 156 - Ib. weights acting at these distances from the fulcrum. Show that this is only repeating what we said about the first order of levers, except that in this case we have the power-arm and the weight-arm on the same side of the fulcrum. In the second order of levers the power always acts at one end, the fulcrum being at the other, and the weight between them. The longer the power-arm is, as compared with the weight-arm, the greater will be the weight which a given power can raise. The power multiplied...
Page 157 - ... increases, and he is able to raise the bigger boy. When it becomes the turn of the big boy to act as power, the power is considerably greater than the weight to be raised, because it is acting at the short arm of the lever. Now consider for a moment. Which boy has the best ride? The little boy. His end of the see-saw rises higher, and moves more quickly than the other end. Now I think you will be 'able to understand what I am going to say further.
Page 20 - The metals are the best conductors of all, but they differ very much one from the other. They stand thus in the order of their conducting power:— Silver, copper, gold, brass, tin, iron, lead, platinum, and bismuth — silver being the best. Among the bad conductors are: — Marble, stone, brick, glass, earthenware, sealing-wax, leather, wood, linen, cotton, and straw. "The non-conductors include bone, horn, feathers, down, fur, wool...
Page 94 - Demerara, grows to the height of thirty feet, but under cultivation the pruning-knife keeps it down to the size and shape of an ordinary cherry-tree. It is an evergreen, the leaves being very similar to those of the cherry, except that they are smooth and glossy, as is the general case with evergreens. The tree does not begin to bear till its sixth year, but after that it is very prolific. The flowers, which are small, grow in thick clusters on the trunk and main branches. The fruit is a kind...
Page 277 - ... town, the drive is under the shadow of lofty hills, richly cultivated and occasionally as richly planted. Between the road and the water, extends a remarkably fertile valley, thick with trees and underwood ; and beyond it stretches the long and narrow Lough with its multitude of islands. These islands are said to equal in number the days of the year;* they are very numerous ; and of all sizes, from the small " clot" to the plain of many acres. All of them are green, and most of them are very...
Page 236 - In every part of the body there must be these two sets of vessels — arteries to bring fresh pure blood ; veins to carry it back to the heart contaminated with impurities. Every artery ends and every vein commences in a network of smaller hair-like capillaries. So close are these tiny vessels placed, that it is impossible to prick the skin anywhere without piercing the walls of some of them, and causing the blood to flow. The walls of the arteries are stout and muscular ; those of the veins are...