sample 43 salt crystals

i glued them on a piece of black cardboard and
moistened it so the crystals melted into one and didn't fall 
off. Texture is not completely homogeneous especially not at 
the edges so i use maximum zoom

aperture: 11 
parameters: p=19 l=171 z=360
zoom maximum

some crystals fell off after calibration.
because of the zoom it's hard to center this one
position 2 not perfectly centered, hard to say

position 6 and 7 were done the next day
noticed at position 6 that theta value is slightly off,
sample is not completely vertical when it should be, i'll check 
calibration parameters

did not do sample calibration by clicking on pictures since the 
zoom is quite different. I have to adjust my program to that: 
first determine the size of the photometer spot by clicking on 
the millimeter paper.