My Articles


Illustration 1A (Guerike's concept and tensile strength)
Two cases of "energy per volume removed from vessels" are shown below. For a comparison of the "suction" strength (per area) and the "tensile" strength (per area) that can arise, see Article, (after noting descriptions below).

(UPPER LEFT): Guericke showed that if he pumped a certain amount of air (i.e. air having energy per volume) out of two metal hemispheres in contact, great "suction strength" would occur, and even several horses could not pull them apart.   (Upper RIGHT): A hot bar of metal is shown solidifying, "heat of fusion" is given off; (i.e. a certain amount of energy per volume is given off), and a certain amount of "tensile strength" can thus develop.

for Venturi application,
go to Illustration 1B
or Back to Article
Carl R. Littmann

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