In order to maintain their body temperatures, Chickadees must take in a large number of food calories which will be metabolized for body heat. Calder (1974) notes that Black-capped Chickadees ... must eat continuously during short daylight hours to stoke their metabolic fires.
Industrial sewing machines are the best option for sewing upholstery-grade fabrics such as vinyl and leather because these machines are designed to handle thicker fabrics. Industrial machines use heavier upholstery thread and often sturdier needles which penetrate the material cleanly.
Notes. 1  Brown & Sharpe 1914, p. 7. 2  CMMC 1922, p. 122. 3  Usher 1896, p. 142. 4  CMMC 1992, pp. 125â127.  5 How to use a Milling Machine. American Machine Tools Co. 6  EncyclopÃ¦dia Britannica 2011. 7  Currently the term miller refers to machines built when that term was current, as with phonograph and horseless carriage..