One such evaporator and condenser heat exchanger design incorporates an aluminum, parallel-flow, flat plate-and-fin configuration with small, parallel channels inside the flat plate. These plates are ...

AT the meeting of the Royal Dublin Society on January 25 last, as reported in NATURE for February 24, p. 850, I described a form of ultramicrometer in which the minute movement of one plate of a ...

PROF. JATJNCEY'S interesting manual for students interprets the term ‘modern physics’ very liberallyhe certainly does not restrict it to ‘atomic’ physics. His liberality of interpretation ...