Black and white photograph of Dick Johnson using a polarimeter. Photo is glued on cardboard backing with red border.Hand written on back: “Optical Munitions E.R. (Dick) Johnson MSc candidate on polarimeter”. Stamped on back: “University of Melbourne School of Physics Melbourne”

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of E.R.Johnson testing fused sandwiched plate glass in a polarimeter. N.B. As at time of writing it is not certain that the “man” pictured in nos. 147 and 149 is the same individual as pictured in no 140. (EGM. 11/11/99)On back of photo in pencil: “No. 20 E.R. Johnson”

Part of a series entitled “Optical Munitions - School of Natural Philosophy, 1942-1945”. Black and white photo of E.R.Johnson testing fused sandwiched plate glass in a polarimeter. N.B. As at time of writing it is not certain that the “man” pictured in nos. 147 and 149 is the same individual as pictured in no 140. (EGM. 11/11/99)In ink on lower left hand corner : “20”.

#S 66&67 CONSTITUTE A SET Brass cylindrical optical element erected on wooden rectangular base. Engraved on barrel: “Husbands Optician. Melbourne & Bristol”. “scale”. “90” on barrel near scale.

Brass cylindrical optical element erected on wooden rectangular base.

Brass cylindrical optical element erected on wooden rectangular base. Label on base: “Nat. Phil. Lab No. Univ. of Melb”

Brass cylindrical optical element erected on wooden rectangular base. Scale round perimeter. Label on base: “Nat Phil No. Univ. of Melb”