15371. How We Know What We Know (29:49)

Date:
1959
Summary:
Dr. Hayakawa develops the idea that what we know of the objective world is a product of our nervous system and, hence, an abstraction from sensory data. Alfred Korzynski’s “structural differential”...

15372. Hunt's Catsup [no title] (01:02)

Date:
1959
Main contributors:
Hunt's
Summary:
The different ingredients of the catsup are shown before switching to a family eating different foods with catsup on it.

15373. Inbreeding and heterosis (29:48)

Date:
1959
Summary:
Discusses the effect of various levels of inbreeding (self-fertilization, sib matings, half-sib matings, cousin marriages) upon making heterozygous genes homozygous with the consequent loss of vigo...

15374. Independent Segregation (30:03)

Date:
1959
Summary:
Demonstrates independent segregation by different pairs of genes using Mendel's data. Emphasizes the chromosomal activities during meiosis which are responsible for independent segregation. Descri...

15375. Indian Valhalla (29:31)

Date:
1959
Summary:
Tells the story and historical significance of the battle of Fort Recovery in the settlement of Ohio. Explains how the grievances of settlers and Indians led to war and ultimate defeat for Native A...

15376. Industry and the worker (29:33)

Date:
1959
Summary:
Rudolph F. Bannow, national vice president and director of the National Association of Manufacturers is interviewed by Dr. EW Ziebarth, news analyst with WCCO, Minneapolis, Minnesota. At the beginn...

15377. Interspecific hybridization and its consequences (29:44)

Date:
1959
Summary:
Pictures reproductive isolation originating through interspecific hybridization, via amphyploidy (radish-cabbage, new world cottons, goatsbeard species), and by means of introgression (tobacco, ros...

15378. Introduction (29:11)

Date:
1959
Summary:
Provides an introduction to the series 'Design Workshop.' Explains how the elements of are and good design are related to everyday living. Shows some of the techniques to be taught in the remaining...

15379. Introduction to America (29:12)

Date:
1959
Summary:
To introduce four students - Adolfo Jose Crosa of Argentina, Rafia Ayub of Pakistan, Kaarina Honkapohja of Finland and Nii Tetteh-Churu Quao of Ghana- to the United States, and the United States to...

15380. Introduction to optics (23:18)

Date:
1959
Summary:
Deals with the approximation that light travels in straight lines and shows four ways in which light can be sent--diffraction, scattering, refraction, and reflection. Diffraction is shown using po...