London: Percy Lund, Humphries & Co, Ltd. 1921. First Edition. , 192 pages (noting front matter bound in after page 4). 8vo. Faded light green buckram binding, with spine label mostly perished, and "Research Laboratories of the General Electric Company Ltd." embossed on front board. Very Good. Cloth. 
Contains the four quarterly issues - January, April, July and October (Nos 64-68). Papers, notices and articles are very interesting and include X-Ray Work at Schenectady by Coolidge ; Electrons by Sir Wm. Bragg ; A New Type of X-Ray Plate by Levy West and Baker; Scattered Radiation and the Use of Intensifying Screens by Luboshev; Inpex Plates by Levy; X-Ray Dosage by Owen and Bowes; Radiography of Pictures by Cheron ; A New Form of Stereo-Fluoroscope by Tyndall and Hill; X-Rays and Propaganda by Andrews; The Potter-Bucky Diaphram by Holbeach; X-Rays and their Industrial Applications by Kaye. With 5 plates.