The pump wearer must learn the technical “ buttonology" of their specific pump and learn how to fill the insulin cartridge / reservoir , change the tubing and infusion set , and calculate appropriate insulin bolus doses.

Climbing plants are monstrous and luxuriant, but others which have never been known to climb elsewhere learn the art as an escape from that somber shadow, so that the common nettle, the jasmine, and even the jacitara palm tree can be seen circling the stems of the cedars and striving to reach their crowns.

It is true to a proverb that we English people have a knack of doing the best possible things in the worst possible way; and that not, unfrequently, when we do once begin doing them we do them to death. It takes some time to convince us that the particular thing is worth doing at all; but, once persuaded, we go in for it with all our British might and main. The beard-and-mustache movement was a case in point. Some years ago a mustache was looked upon by serious English people as decidedly reckless and dissipated. A beard was fit only for a bandit. Nowadays the mildest youth in the Young Men's Christian Association may wear a mustache without being denounced as “carnal,” and paterfamilias revels in the beard of a sapeur, no misopogon daring to say him nay.

Define maps G:A→B and F:B→A by G(a)=y!∈!Y|∀x!∈!ax𝜌y and F(b)=x!∈!X|∀y!∈!bx𝜌y. Then (F,G) is called a Galois connection of the first kind.