english: In his book, assisted by his son, Francis -- who was the first professor of plant physiology in the world, in Cambridge -- they took into consideration every single movement for 500 pages.
non_english: In zijn boek, met als assistent zijn zoon Francis -- die de eerste professor plantfysiologie was ter wereld, in Cambridge -- namen ze iedere aparte beweging onder de loep gedurende 500 bladzijden.