June 26th, 2017

* I attempted to take a look at a book on pre-calculus that I'd gotten a month
  or so ago for fun; but apparently my booklet of graph paper was missing, so I
  couldn't actually make much progress in it! Oops.

* I read the first couple sections of Charlie Brown's 'Cyclopedia, volume 2,
  Featuring All Kinds of Animals from Fish to Frogs. Obviously it's an animal-
  themed book. I found it interesting that, under a question titled "why do
  some animals die out?", they said that no animals had gone extinct due to
  pollution yet. The book is some thirty years old; I suppose that's changed
  quite a lot in more recent times..

  Also of note was that the book's first page number is 49; and it ends on page
  99. I suspect each volume in the series has roughly 50 pages, and that the
  page number carries across books.

* I celebrated reaching a thousand lines in my log file - wonderful! It's been
  nearly a month I've been filling it up, as well.

* I discovered that I managed to bork my Raspberry Pi by leaving it plugged
  into the battery pack overnight; I suppose it must have ran out of power
  while performing some file I/O. Yikes!

* While working on improvements for http-music, I discovered mpv, a music
  player command that is in general better than SoX's play command. I worked
  that into my music player; now it can seek back and forth through the active
  track, change the output volume (while the track is playing), and pause/play.

* I read about various USB connector types:
  https://en.wikipedia.org/wiki/USB#Connector_types