This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 Excerpt: ...not show the rate of growth. The real rate can be represented in the following manner with approximate accuracy. From the weight which an animal has on a given day and that which is found at the next weighing, I reckoned the average daily increase during the period between the two weighings, and then changed these ...
Read More
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 Excerpt: ...not show the rate of growth. The real rate can be represented in the following manner with approximate accuracy. From the weight which an animal has on a given day and that which is found at the next weighing, I reckoned the average daily increase during the period between the two weighings, and then changed these increases into the per cent. value of the weight at the beginning of the period. This method may be modified by calculating instead of the daily, the monthly or yearly percentage increases. 51117OZ935 1,5 60 75 90 105 120 135 150 165 180 195 210 days Fig. 27.--Curve of the daily percentage increase in weight of male guinea-pigs. The method is of course mathematically not exact, since the weight is constantly changing. It suffices, however, for our purposes. It is easy after one has calculated a series of percentage increments in weight to construct a curve. The results obtained in this way I wish to lay before you. When guinea-pigs are born, they suffer in consequence of the great sudden disturbance of their conditions of living a temporary inhibition of their development. They recover within two or three days, and thereupon we observe that they may increase their weight over 5 per cent, in one day, Fig. 27. By the time they are seventeen days old, they grow only only about 4 per cent. and at forty-five days only a little more than 1 per cent. and from this age on the rate of growth sinks slowly until at the end of the first year it becomes almost zero. The general process is the same in females, Fig. 28, as in males, although certain inequalities occur. It is obvious that if we consider the curves, Figs. 27 and 28, carefully, we can distinguish in them two chief periods, which, however, pass into one another without definite boundaries. 5TI1723Z9...
Read Less
Add this copy of Modern Problems of Biology; to cart. $15.00, fair condition, Sold by Midtown Scholar Bookstore rated 5.0 out of 5 stars, ships from Harrisburg, PA, UNITED STATES, published 2010 by Nabu Press.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
Fair. COLLECTIBLE-This is the 1913 HARDCOVER edition, published in Philadelphia by P. Blakiston's Son & Co., and printed at the Maple Press in York, PA. This is a damaged book. May be ex-library, water-damaged, or spine creased/broken. Acceptable, Reading copy only, with writing/markings and heavy wear. Standard-sized.
Add this copy of Modern Problems of Biology: Lectures Delivered at the to cart. $36.13, new condition, Sold by Revaluation Books rated 4.0 out of 5 stars, ships from Exeter, DEVON, UNITED KINGDOM, published 2009 by Cornell University Library.
Add this copy of Modern Problems of Biology to cart. $54.95, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2015 by Palala Press.
