Puzzle Answers April 2017
1 Apr 2017 by qmwwwtqmqt.d qmwwwtqmqt.d
ACROSS: 1 Pi-meson 5 Fulcrum 9 Sal volatile 10 Fat 11 Escallop 12 Basalt 14 Ruler 15 Inundated 16 World War I 18 Lever 20 Lieder 21 Tangoist 23 Rig 24 Fast-breeder 25 Matisse 26 Xeroxed. DOWN: 1 Pasteur 2 Molecular weight 3 Spoiler 4 Neapolitan 5 Foil 6 Leeward 7 Refractive index 8 Mutated 13 Musical box 16 Wolfram 17 Dreyfus 18 Legwear 19 Retired 22 Isle.
The microscope image shows several pigment scales scattered in the skin of a Porbeagle shark (Lamna nasus). The image is taken from a Victorian slide mount of shark skin. Colour is produced using the illumination technique of differential interference contrast in the microscope, together with an adjustable compensator (lambda plate), so called 'colour DIC'.
Credit: David Linstead and the Royal Society of Biology
