G. Gilmer Catalog No 26 (Circa 1900)

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NOUVEAUX APPAREILS POUR EXPÉRIENCES SCIENTIFIQUES PAR PROJECTION NEW RACKWORK SLIDES FOR SCIENTIFIC PROJECTION NEUE APPARATE ZUR PROJEKTION WISSEN- SCHAFTLICHER EXPERIMENTE Fig. 135^ Fig. >35 c Fig. 135 e Fig. 135 e N" 231 A Eidotrope (Fig. 135''). Deux disques en métal perforé, donnant une grande variété de dessins. Frs 15 » N" 231 e Kaleidotrope (Fig. 135"). La rotation du disque perforé montre une variation considérable de des- sins Frs 7.50 Disque en métal en plus » 1.75 N" 231 e Anorthoscope (Fig. 135 e ). Projette cinq images symétriques obtenues d'une image difforme. Frs 45 » N" 231 e La Toupie colorante (Fig. 135 °) de MM. Newton. Frs 45 » N" 231 e Teintoscope Benham (Fig. 135 e ). Des lignes noires parallèles sur un disque blanc paraissent, en tournant, rouges, jaunes, vertes et bleues, suivant leur position. Utiliser le plus fort éclairage . Frs 22.50 N" 231 A Eidotrope (Fig. 13s '•J. Two perforated dises showing endless varietv of designs ... £ 0.12.0 N" 231 e Kaleidotrope (Fig. 135 e ). The rotation of the perforated dise gives a gfeat variety of designs. i' 0.6.0 Additional dise » 0 . 1.5 N ' 1 231 e Anorthoscope (Fig. 135 e ) projects 5 symmetrical figures obtai- ned from one distorted figure. £ 1.16.0 N'' 231 e Colouring Top (Fig, 135 e ) by Newton £ 1.16.0 N" 231 e Benham Tintoscope (Fig. 135 e ) Black parallel Unes on a white dise, when rotated, appear red, yel- low. green and blue according to their position. Use a strong illumi- nant £ 0 . 18.0 N° 231 A Eidotrop (Fig. 135 •'*). Zwei perforirte Platten, welchc die schûns- ten Figuren in endloser Abwechs- lung zeigen M 12 — N" 231 e Kaleidotrop (Fig. 135 e ). Durch Drehen der durchlôcherten Scheibe wird eine grosse Anzahl ver- schiëdéner Figuren erzeugt. M 6 — Extra Scheibe » 1.40 N 231 e Anorthoskop (Fig. 135 e ). Ein verzerrtes Bild wird in 5 syme- trischen Bildernprojicirt. M 36 — 231 e Farbkreisel (Fig. 1 35 e ) nach Newton M 36 — 231 e Benham Tintoskop (Fig. 135 e )- Parallèle schwarze Linien auf ciner rotirenden weissen Scheibe erscheinen nach ihren jeweiligen Stcllungen rot, gelb, grün und blau. Nur mit starken Lichtquellen ver- wendbar M 18