Slides 29-30: Detecting the Interstellar Hydrogen Line, 1951
![[Letter from Purcell to Pawsey]](ewen_HI_slide29.jpg)
![[Letter from Purcell to Pawsey]](ewen_HI_slide30.jpg)
Slide 31
Modified on by Ellen BoutonSlides 29-30: Detecting the Interstellar Hydrogen Line, 1951
Slide 29: Page 1 of letter from Purcell to Pawsey, May 9, 1951, describing the equipment, the results, and future equipment needs. [Photo courtesy of Doc Ewen]
Slide 30: Page 2 of letter from Purcell to Pawsey, May 9, 1951. Purcell says, "I think we ought to send a letter to the Physical Review or Nature (probably the latter) fairly soon.... We will allow time for a reply to this letter before sending anything off." [Photo courtesy of Doc Ewen]
Slide 31