Animated diagrams show the fly as a disease carrier in the United States. Animated diagram based on statistics shows the relation of intestinal diseases to the prevalence of flies and depicts deaths from typhoid. Views of eggs of fly. They develop into hairless whitish larvae. While feeding on the manure in which they live the larvae gradually change into pupae. At the termination of the pupa stage the fly comes out of the pupa case.
A data shows that the fly is responsible for millions of progeny in the United States. The data depicts that as an adult female fly lays batches of 150 to 200 eggs several times during her short life, she is responsible for millions of progeny. To terminate the young flies: a woman pours formalin into a plate and places it in a window. The flies are poisoned and are terminated.
Methods to protect human beings from disease-carrying flies in the United States. Food suppliers at a shop - those protect merchandise from the flies. They keep their merchandise in glass shelves. A man screens his house with his child. A diagram shows exterminated fly.
Flight tests of Ercoupe airplane without and with an auxiliary jet propulsion at March Field in California. The flight test is conducted to furnish information on the effect of auxiliary jet propulsion on short take off distance and time, effect on stability and control and effect of blast from jet units on the airplane structure. Check posts at March Field. Men at machines during flight testing. The men enter a check post made of aluminum sheets.
Flight tests of Ercoupe airplane without and with an auxiliary jet propulsion at March Field in California. Check posts made of aluminium sheets at an airfield. A sign on a check post: 'Explosives'. Solid propellant sections leave thrust to be used in Ercoupe airplane flight tests at the airfield.
Flight tests of Ercoupe airplane without and with an auxiliary jet propulsion at March Field in California. The Ercoupe airplane taxis with 2 jet units firing. It is piloted by Captain Homer A. Boushey Jr. The pilot steps from the airplane. Crew works near the airplane for static tests. (World War II period).
CRITICALPAST.COM: About Us | Contact Us | FAQs - How to Order | License Agreement | My Account | My Lightboxes | Shopping Cart | Advanced Search | Featured Collections | Website Terms & Conditions | Privacy Policy | Links ©2024 CriticalPast LLC.
License Agreement |
Terms & Conditions |
Privacy Policy
©2024 CriticalPast LLC.