A Continuous Comparison Radiometer at 97 GHz (Correction)

In the above paper, the reference to Faris should not imply that the correlation radiometer was invented by Faris. This class of radiometers was devised by Dr. Emil Blum and described in his paper "Sensibility des radiotelescopes et recepteurs a correlation," which appeared in A nnales D \´Astrophysique, vol. 22, no. 2, pp. 139-163, Mar-Apr. 1959. Dr. Blum\´s contribution was also cited in the paper "Radio telescopes," published in Methods of Experimental Physics, vol. 12, pt. B, pp. 218-219.