Applied Eugenics

Cover image for

Download


Co-author: Paul Popenoe
Published: 1918
Language: English
Wordcount: 159,553 / 499 pg
Flesch-Kincaid Reading Ease: 53.7
LoC Category:
Downloads: 1,068
Added to site: 2006.10.18
mnybks.net#: 14994
Origin: gutenberg.org
Genre: Non-fiction
Excerpt

ood supply, etc. On the other hand, there are factors which, although having inherited bases, owe their expression almost wholly to outside influences. Professor Morgan, for example, has found a strain of fruit flies whose offspring in cold weather are usually born with supernumerary legs. In hot weather they are practically normal. If this strain were bred only in the tropics, the abnormality would probably not be noticed; on the other hand, if it were bred only in cold regions, it would be set down as one characterized by duplication of limbs. The heredity factor would be the same in each case, the difference in appearance being due merely to temperature.

Mere inspection does not always tell whether some feature of an individual is more affected by changes in heredity or changes in surroundings. On seeing a swarthy man, one may suppose that he comes of a swarthy race, or that he is a fair-skinned man who has lived long in the desert. In the one case the swarthiness would be inheritable, in the other

(Promote your book here)

Featured Books

Cover image for Applied Eugenics by Roswell Hill Johnson - Free eBook

Who Murdered Mr. Malone?

Garden Girls Christian Cozy Mystery Series Book 1
Hope Callaghan

Who Murdered Mr. Malone? Book 1 of the Garden G... Read more

Cover image for Applied Eugenics by Roswell Hill Johnson - Free eBook

Phantasia

Book One: Into the Rain
M.U. Riyadad

After finding the body of a dragon in a metalli... Read more

Cover image for Applied Eugenics by Roswell Hill Johnson - Free eBook

Fearsome

Fearsome Series Book 1
S.A. Wolfe

*This is a stand-alone book in the Fearsome Ser... Read more

Cover image for Applied Eugenics by Roswell Hill Johnson - Free eBook

Nano Contestant

Episode 1: Whatever It Takes
Leif Sterling

Fans of the Hunger Games and Sci-Fi Thrillers will... Read more

Cover image for Applied Eugenics by Roswell Hill Johnson - Free eBook

Anais of Brightshire

The Blood Mage Chronicles Book 1
Jamie Wilson

While rumors of monsters rising in the south bring... Read more

Cover image for Applied Eugenics by Roswell Hill Johnson - Free eBook

Sound of Sirens

Tales of Skylge #1
Jen Minkman

On the island of Skylge, electricity is only fo... Read more

(advanced)
login | register

User ID

Password

reset password

Help ManyBooks by sharing this page!

See it as donating a moment of your social media time, every little thing helps us improve and stay online.

Popular in This Genre

The list of books below is based on the weekly downloads by our users regardless of eReader device or file format.

The Art of Public Speaking
by Dale Carnegie
The Age of Reason
by Thomas Paine
On the Origin of Species
by Charles Darwin

See more popular titles from this genre.