MARIETTA APPARATUS COMPANY Psychological Equipment MARIETTA. OHIO V1001 Standard Lamp VI002 Carbon Arc Lamp V1003 Neon Lamps V1004 Spectrum Tubes V1005 Spectrum Tubes V1101 Optical Disk V1201 Neutral Tint Filters V1202 Neutral Tint Wedges V1203 Monochromatic Filters V1204 Monochromatic Filters V1208 Red, Green & Blue Filters V1210 Colored Gelatine V1211 Mazda to Daylight Filter V1212 Stereo Red and Green Filters 71214 Set of Dichroic Filters V1215 "Subjective Yellow" Dye V1301 Color Dislcs-Paper V1302 Color Disks-Cardboard V1303 Color Disks-Celluloid V1305 Colored Yarns V130S Black Celluloid Sheets V1307 White Celluloid Sheets V1309 Magnesium Block V1310 Magnesium Ribbon V1311 Black Box V1315 Brightness Scale, V2001 Anatomical Model of Eye V2002 Charts of Eye V2005 Skioscopie Eye V2006 Kuehne Eye Model V2007 Blind Spot Cards V2009 Knapp’s Ophthalmotrope V2010 Eye Movement Mirror V2011 Wink Reflex Apparatus V2012 Pbacoscope V2016 Chromatic Aberration Apparates V2017 Bezold Figure Card V2018 Irradiation Card V2019 Helmholtz Checker Board V2020 Isoscope V2021 Acuity Charts V2022 Astigmatic Charts V2023 Heterophoria Test V2024 Trial Frame 72025 Trial Frame V2026 Lenses, Cylinders and Prisms V2027 Simple Retincscope V2028 Electric Retinoscope V2029 Doring Ophthalmoscope V2030 Electric Ophthalmoscope V2031 Ophthalomometer V3001 Spectroscope V3003 Spectroscope V3004 Spectroscope V3005 Replica Grating Spectroscope V3006 Absorption Band Plates V3010 Double Replica Crossed Gratings V3101 H.B, & S, Demonstrator V3201 Lambert’s Color Mixing Box V3202 Conventional Color Shadow Board V3203 Binocular Color Mixing Cards for Sterescope V3204 Binocular Red and Green Mixer V3206 Maxwell Disk Rotator V3207 Maxwell Disk Rotator 73208 Differential Rotator, Marietta Type 73209 Differential Rotator, Diel V3301 Simultaneous Induetion 8ards V3303 Simultaneous Induction Disks V3304 "Negative After-Image Cards V3306 Benham Disk V3307 Bering’s Contrast Box ¥3305 After Image Apparatus V3401 Threshold Disks V3402 Simple Masson Disk 74001 Optical Bench V4002 Lummer-Brodhun Photometer Box ¥4003 Bunsen Photometer V4004 Polarizing Photometer V4009 Sector Disk (Rotating Rhomboid Prisms) V4010 Foot Candle Meter V4011 Flicker Photometer V4013 Spectrometer V4014 Spectrometer V4015 Standard Spectrophotometer V4017 Photochromatic Interval Apparatus 75001 Peter’s Hand Campimeter ¥T5002 Carr’s Campimeter V5003 Schweigger Perimeter V5006 Perimeter Charts 75007 Registering Perimeter 75008 Mcliardy Perimeter 75009 Mcliardy Electric Perimeter 75010 Marietta Perimeter 76001 Monochromatic Colorimeter 76002 Dichromatic Colorimeter 76003 Trichromatic Colorimeter, Additive