Chapter IX

100. Stereoscopic Sciagraphs. THOMSON, E.

101. Obtaining Manifold Sciagraphs THOMSON, E.
Simultaneously upon Superposed
Photographic Films and through Opaque
Materials, and thus Indicating
Relative Sensitiveness of Different
Films to X-rays. Intensifying Process
Applicable in Sciagraphy. Thick Films
Appropriate.

101_a_. Sciagraph Produced through 150 Sheets LUMIÈRE.
of Photographic Paper.

102. Discharge Tube Adapted for Both THOMSON, E.,
Unidirectional and Alternating and SWINTON
Currents.

103. X-rays. Opalescence and Diffusion. THOMSON, E.,
PUPIN, and
LAFAY

103_a_. Diffusion and Reflection in Relation to IMBERT, _et
Polish. al._

104. Fluorometer. Fluorescing Power of THOMSON, E.
Different Discharge Tubes Compared.

105. Modified Sciascope for Locating the THOMSON, E.
Source and Direction of X-rays.
Phosphorescence Not an Essential
Accompaniment in Production of
X-rays.

106. X-rays from Discharge Tube Excited by RICE, PUPIN,
Wimshurst Machine. Full Details Given and MORTON
of the Electrical Features.

107. Source of X-rays Determined by RICE
Projection through a Small Hole upon
Fluorescent Screen Adjustable to
Different Positions.

107_a_. Use of Stops in Sciagraphy. LEEDS and
STOKES

107_b_. X-rays from Two Phosphorescent Spots. MACFARLANE,
KLINK, WEBB,
CLARK, JONES,
and MORTON

108. Source of X-rays Determined by Shadows STINE
of Short Tubes.

109. Instructions Concerning Electrical STINE
Apparatus for Generating X-rays.

110. Apparent Diffraction Really Due to STINE
Penumbral Shadows.

110_a_. Non-diffraction. PERRIN

159_a_. Non-Refraction

111. Source of X-rays Tested by SCRIBNER and
Interceptance of Assumed Rectilinear M’BERTY
Rays from the Cathode.

112. Source of X-rays on the Inner Surface SCRIBNER and
of the Glass Tube Determined by M’BERTY,
Pin-hole Images. PERRIN

112_a_. Anode Thought to be the Source. Cause DE HEEN
of Error Suggested.

113. Pin-hole Pictures by X-rays Compared LODGE
with Pin-hole Images by Light to
Determine the Source. X-rays Most
Powerful when the Anode is the Part
Struck by the Cathode Rays.

114. Valuable Points Concerning Electrical LODGE
Apparatus Employed.

115. X-rays Equally Strong during Fatigue of LODGE
Glass by Phosphorescence.

116. Area Struck by Cathode Rays Only an ROWLAND,
Efficient Source when Positively CARMICHAEL,
Electrified. and BRIGGS

117. Transposition of Phosphorescent Spot SALVIONI,
and of Cathode Rays without a Magnet. ELSTER,
GEITEL, and
TESLA

117_a_. Molecular Sciagraphs in a Vacuum Tube. HAMMER and
FLEMING