...observations originally made by eye observation with the fluorescent screen. Here the power of the X-rays to pass through wood or cardboard becomes useful....impression on the plate is a direct effect of the X-rays, or a secondary result induced by the fluorescence of the material of the plate. Films can receive...

...observations originally made by eye observation with the fluorescent screen. Here the power of the X-rays to pass through wood or cardboard becomes useful....removal of the shutter of the dark slide or other projecting case, so that the experiment need not be conducted in darkness. Manifestly, unexposed plates...

...originally made by observations with the eye through the fluorescent screen. Here the power of the rays to pass through wood, or cardboard, becomes useful. The photographic plate can be exposed to their action without removing the protecting case, • so that experiments need not be conducted in...

...so as to exclude the danger of error. 1 have thus confirmed many observations originally made by eye observation with the fluorescent screen. Here the...in darkness. Manifestly, unexposed plates must not l>e left in their box near the vacuum tube. It seems now questionable whether the impression on the...

...observations originally made with observations with the eye through the fluorescent screen. Here the power of rays to pass through wood or cardboard becomes useful. The photographic plate can be exposed to their action without removing the protecting case, so that experiments need not be conducted in darkness....

...observations originally made by eye observation with the fluorescent screen. Here the power of the X-rays to pass through wood or cardboard becomes useful....darkness. Manifestly unexposed plates must not be left in then* box near the vacuum tube. 'It seems now questionable whether the impression on the plate is a...

...so as to exclude the danger of error. I have thus confirmed many observations originally made by eye observation with the fluorescent screen. Here the...experiment need not be conducted in darkness. Manifestly, uuexposed plates must not be left in their box near the vacuum tube. It seems now questionable whether...

...observations originally made by eye observation with the fluorescent screen. Here the power of the X-rays to pass through wood or cardboard becomes useful....impression on the plate is a direct effect of the X-rays, or a secondary result induced by the fluorescence of the material of the plate. Films can receive...