Modern magic lanterns; a guide to the ... - Yesterday Image

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78 MODEBN MAGIO LANTEBNS.diversity in this respect, but it is now getting customary forslides to be marked on the lines laid down by the PhotographicClub a few years ago, this should always be done. Themarking consists of indicating the two top corners of thesUde by two spots, which are best white on a black background,or black on a white one, as shown in Fig. 43. Notonly must they indicate the top of the slide, but they mustact as a guide to the face of the slide, which has to go nextthe condenser. To ascertain this, the slide should be heldup in front of a piece of white paper in the position in whichit is intended to be seen upon the screen, that is to say, withany inscription it may contain reading the right way roundand not backwards. The two spots, which may convenientlybe cut out of stamp-paper with a punch or pair of scissors,should then be stuck on the two top corners of that side ofthe sUde facing the observer. In putting slides into thecarrier, they must be put in upside down for reasons pointedout before (chapter X.), and when to be seen by reflection onan opaque screen of any kind (Fig. 54) the spotted side mustgo next the condenser ; when shown on a translucent screen(Fig. 66) the spotted side of the slide must be turned awayfrom the condenser. If this is not attended to, the piotiureas seen wiU be reversed from left to right, and any lettering,names over shop doors, and the like, will read backwards.The slides should always be rubbed over with a cleanduster before being shown, any dust or jBnger marks uponthem will be enormously magnified on the screen. For thisreason they should be held by one corner on putting theminto the carrier and not fingered all over.During an exhibition of slides the room should be kept asdark as possible. This seems so obvious as not to requiremention, but the writer has often seen the brilliancy andbeauty of a display spoilt by the amount of stray light aboutthe room, proceeding both from the ordinary lights whichwere only turned down and neither quite nor almost extinguished,as they should have been, and from the back ofthe lantern itself. Another cause of failure is to be found ina rickety lantern-stand. We have a lively recollection of anexhibition of shdes in which the lantern-stand, though firmenough in itself, was mounted on a platform of floor boards
—THE MANIPULATION OP THE LANTEEN. 79insufficiently provided with supporting joists, in consequencethe exertions of the lanternist in putting a fresh slide intothe carrier were sufficient to make the picture on the screenwobble up and down quite a foot. Minor matters are thefollowing :(1) Do not omit to turn the lime, from time to time.(2) Keep the audience away from the immediate neighbourhoodof the screen ; they wiU see better and likeit better, although as a rule they will not keep off oftheir own accord.(3) Make sure there is ample gas for the display, even ifaccidentally prolonged a little.(4) Never allow the audience to see the bare screenilluminated with the full light of the lantern, all slideswill look duU and heavy after so doing.(5) The gas, if in bags, should be kept where it cannotbe meddled with; if in cylinders, where they cannotroll or fall.(6) Be particularly careful never to put a slide inupside down or wrong way round, unless they arethose of a friend who is present and who neglects tospot them.(7) Never leave a lime in the lantern after use. If donewith throw it away, do not let it fall to pieces andfill the lantern with dust.
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In^ f-e'
Page 3 and 4:
Cornell UniversityLibraryThe origin
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HUbrniiiS'OXYGENSiMPIiEXCERTAIN ACT
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HUGHES' SPECIAL BIDNIALWith Solid B
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HUGHES' PATENT BIJOUENLARGINGLANTER
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MODERN MAGIC LANTERNS.
Page 13 and 14:
:MODERNMAGIC LANTERNSA GUIDE TOTHE
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Preface to the First Edition.Some f
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CONTENTS.Chap.I. InteodttctokyII. O
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Modern Magic Lanterns.CHAPTER I.3nt
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INTEODUOTOET.ifeet in diameter, a m
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CHAPTERII.Nearly all the old-fashio
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OIL LAMPS.the other end, which went
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OIL LAMPS.aThey should be trimmed e
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CHAPTER III.^beXimeligbt.The most p
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THE LIMELIGHT. 13be incapable of be
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THE LIMELIGHT. 15in a moment on loo
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THE LIMELIGHT. 17is not used to the
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HOME-MADE OXYGEN, GAS HOLDBES, ETC.
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HOME-MADE OXYGEN, GAS HOLDEES, ETC.
Page 41 and 42:
—BOME-MADB OXYQEN, QAfi HOLDBBS,
Page 43 and 44:
CHAPTER V.Compteeaeb(Baeee.Most lan
Page 45 and 46: OOMPEESSED GASES. 27with the pressu
Page 47 and 48: COMFBESSED GASES. 29are atmospheres
Page 49 and 50: COMPKESSED GASES. 31for tttmmg on a
Page 51 and 52: —OOMFBESSED QASEB. 33foot, red or
Page 53 and 54: CHAPTEE VI.jetber, 3ncant)escent (5
Page 55 and 56: ETHEE, INCANDESCENT GAS, ACETYLENE,
Page 57 and 58: ETHEB, INOANDSSCEMT QAB, AOEXYLENE,
Page 59 and 60: JETS. 41inch above the top of the w
Page 61 and 62: JETS. 43As the jet plays upon the l
Page 63 and 64: JETS. 45unless the pressure is grea
Page 65 and 66: THE ELEOTBIO LIGHT. 47"Where a very
Page 67 and 68: THE EIiEOTEIO LIGHT. ^9Borland, of
Page 69 and 70: THE ELBOTEIO LIGHT. 61solid. In get
Page 71 and 72: CHAPTER IX.^be XanternBo^i^.The var
Page 73 and 74: THE LANTBEN BODY. ,55above the othe
Page 75 and 76: THE LANTEEN BODY. 57mounted slide i
Page 77 and 78: yhavingTHE LANTEEN BODY. 59by which
Page 79 and 80: THE IiANTEEN BODT. 61Eoss' new Lime
Page 81 and 82: THE OPTIOAIi SYSTEM. 63enclosed by
Page 83 and 84: THE OPTICAL SYSTEM. 65a 4| inch wil
Page 85 and 86: THE OPTICAL SYSTEM. 67Perhaps the m
Page 87 and 88: ;CHAPTER XI.^be Screen anb (Beneral
Page 89 and 90: THE SOEEEN AND OENEBAIi AERAKQEMENT
Page 91 and 92: THE SCBEEN AND 6ENEBAL ABBANGEMENTS
Page 93 and 94: CHAPTERXll.Zbe flDanipuIation of tb
Page 95: THE MANIPULATION OF THE LANTEEN. 77
Page 99 and 100: MOVING SLIDES AND EFFECTS. 81The pa
Page 101 and 102: MOVING SLIDES AND EFFECTS. 83marked
Page 103 and 104: CHAPTER XIV.Xantern fiyperimente.Th
Page 105 and 106: LANTEBN EXPEBIMEMTS.plate. "When de
Page 107 and 108: LANTERN EXPEBIMENT8. 89Zentmayer's.
Page 109 and 110: LANTEBN EXPEEIMENTS. 91reflector, o
Page 111 and 112: CHAPTEE XV.^be Xantcrn*»Spectrosco
Page 113 and 114: THE LANTEBN-SPEOTEOBOOPE, -POLABISC
Page 115 and 116: THE IiANTBBN-SPEOTBOSCOPB, -POIiABI
Page 117 and 118: THE IiANTEEN-MICEOSOOPE. 99one lant
Page 119 and 120: THE LANTBEN-MICEOSCOPS, 101jet to b
Page 121 and 122: ANIMATED LANTEBN PIOTUEES. 103revol
Page 123 and 124: ANIMATED LANTEBN PIOTUEES. 105point
Page 125 and 126: [antern * =Highest Quality only.[en
Page 127 and 128: INDEX.C.Abaorption, to show, 94Acet
Page 129 and 130: iINDEX. 109Lantern, epectrosoope, 9
Page 131 and 132: INDEXTo the Practical HandbooksPubl
Page 133 and 134: and—';Catalogue .,PracticalPublis
Page 135 and 136: Chas. Sceibneb's Sons, New Ywh.Bunk
Page 137 and 138: 'ofCage;Chas. Scbibnee'b Sons, New
Page 139 and 140: Chas. Scbibnek's Sons, New YorTc. 9
Page 141 and 142: 'Ohas. Sceibnee's Sons, New Yorle.
Page 143 and 144: :Ohas. Sceibneb's Sons, New Yorh. 1
Page 145 and 146: Chas. Scbibnee's Sons, New York. 15
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