Now showing items 61-70 of 79
The selective stimulation of respiration in mixed cultures of bacteria and protozoa
A study of the selective stimulation of respiration in the cultures of bacteria and protozoa, as found in a typical domestic waste water, was conducted in the Sanitary Engineering and Science Laboratory of The Rice Institute ...
Effect of vibrations on the yield strength of a low carbon steel
Experimental results show that, when a specimen is subjected to vibration in the frequency range from 15 kc to 80 kc, the steady stress necessary to cause plastic deformation is appreciably reduced. This reduction is ...
An investigation of a condenser microphone as a pressure transducer
The device described is a preasure-sensitive transducer. commercially available condenser microphone, a Stephens model C-1 was used as a capacitor manometer. The instrument was developed for use in breath velocity studies ...
A study of foams
The design of a model for studying vibrations in rotary drilling strings
Dimensional analysis methods are used in designing a model rotary drilling string on which vibrational studies may be made. Practical considerations and limitations of materials necessitate making various approximations, ...
A servomechanism pantagraph
A study of ultimate design as applied to rigid frames
The methods of analyzing rigid frames in present use are known to have many undesirable characteristics which are either directly or indirectly the result of limiting stress and strain to values below the proportional ...