Crookes spinthariscope slides made from radium (said to have been sent by Madame Curie) Crookes spinthariscope slides made from radium
Crookes spinthariscope signed "Armbrecht, Nelson and Co., Duke St, Grovenor Square, W" and marked "SPINTHARISCOPE 2 CROOKES 1903" early 20th century. Spinthariscope 1903
Spinthariscope. 1" diameter x 1 5/8" long. Manufactured by Negretti & Zambra. Engraved: W. Crookes, 1903. spinthariscope 1903
