Webster's Practical Forestry: A Popular Handbook on the Rearing and Growth of Trees for Profit Or Ornament

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W. Rider & son, limited, 1917 - Arboriculture - 302 pages
 

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Page 163 - Chemistry tells us that it is composed of two gases called hydrogen and oxygen, in the proportion of two of the former to one of the latter, by volume, and one of the former to eight of the latter, by weight.
Page 230 - has thought fit to produce this wasting ore more plentifully in woodlands than any other ground, and to enrich our forests to their own destruction...
Page 40 - The difference between the sums of the numbers in these two columns will be equal to the height of one extremity (A) of the line, above the other (D).
Page 39 - B ; that point of course being the highest at which the distance of the vane from the ground is the least. A similar process is repeated with respect to the points B and c, the instrument being placed at...
Page 237 - ... by any city. They do provide a source of information on these important phases of city government and management, and may be used as a guide for those cities developing this part of the city ordinance for the first time or are currently revising old ordinances to make them more effective. Conditions vary so much in different parts of the country that it is practically impossible to develop a City Ordinance, Arboricultural Specifications and Standards of Practice that would apply equally well...
Page 285 - I have no hesitation in saying that the area of plantations in the United Kingdom could at once be doubled by the planting of waste lands which at present do not bring in over 2s. per acre...
Page 88 - Society that Westminster Abbey had suffered from more rapid decay in the last hundred years than in all the previous centuries of its existence.
Page 38 - The relative heights of a series of points are obtained by means of their vertical distances from others which, on the supposition of the earth being a sphere, are equally distant from its centre, and these, which are called level-points, must be found by an instrument constructed for the purpose —spirit-level, theodolite, etc.
Page 274 - ... of saltpetre, fill with water, and plug up close. In the following spring, put in the same hole half a gill of kerosine oil, and then light.
Page 272 - Orouud. the eye must follow up the longer lath (d, d, d) until it is in a line with e, the top of the tree or object you wish to measure. The frame must be placed as level with the bottom of the tree as possible. Should the ground be very uneven you must give and take accordingly. You will see that a to c is the same length as o to e, and thus the height of the tree is obtained.— E. COVEHEY, in

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