The large triangular muscle of the shoulder -- the deltoid -- is one of great strength, as in fact are all the muscles of the arm.  If you grasp the arm tightly just above the elbow joint, and then bend the forearm, you will feel the biceps muscle of the arm become firm, hard and prominent; now straighten it again and it becomes relaxed, whilst the muscles on the back of the arm become hard and prominent. The muscles of the forearm are the flexors and pronators; that is, they flex the arm and turn the palm downward.  In each upper extremity or arm there are fifty-three muscles, and we observe here the nicest and most economical method of packing away the muscles that could be improvised, securing strength, giving elegance to its form and shape and facilitating its mobility.

Additional Articles from the Book of Medicine:

• Fleas
  
  

  Fleas.—There are one hundred varieties of this pest which live on dogs, cats, birds, squirrels, rats, mice, etc. It has been proven that fleas carry the germs of Bubonic Plague, which has caused as high as 113 deaths in 119 cases during an epidemic. The disease was found to be spread by means of rats, mice and squirrels of all species and the flea (pulen fasciatus) in the fur of the animals was the medium by which the disease was conveyed to human beings by biting them and injecting the germs of Plague into their blood.

  The forms which pester the American homes are the Rouse Flea (Pulen Irritans), the Cat Flea (Pulen Felinius), and the Dog Flea (Pulen Canis).
  

  While we have made major advances in the treatment and prevention of fleas, the speed of their prevention as not advanced along a path like Moore’s Law where we see advances in computer chips and flash memory doubling on a regular basis.

  Each female flea deposits from eight to twelve whitish ovoid eggs in dust or lint, under carpets and the larger crevices of wood­work. In the summer they develop in about four weeks from the egg to the adult flea, in winter they develop in about six weeks. Four to six broods, as a rule are hatched out during each summer.

  The House Flea occurs in dwellings, breeding in bedding, clothing, carpets, window curtains, etc. They attack their victims at night. The Cat and Dog Flea, though they annoy only their respective victims, are as troublesome to human beings as the human flea.

• Pulmonary Veins
  
  

  Pulmonary Veins. – From this net-work of arteries and air sells the radicals of the pulmonary veins arise, and, coalescing into larger and larger branches, at length accompany the arteries and return the blood to the left auricle of the heart in a purified condition. The pulmonary arteries and veins differ from the same vessels in the other parts of the body, since the former conveys the innocent blood, and the latter arterial blood.

  _____________________
  I stopped on this short paragraph as I approach some larger sections. This segment again makes a reference to the word “net-work” in a style that is now out dated. The next section takes us into Breathing and then lung capacity.

• From Mothers Home Nursing Families to Nurses Traveling Across the US
  
  

  I was doing some research on nursing last night and I came across an interesting trend.  Nurses today in the present-day are finding in taking temporary positions that enable them to travel across the United States to work as a nurse in multiple locations, or should say in different locations.  So for example if you are a nurse and you wanted to spend the winter in Miami, you could accept a position as a travel nurse and work in Miami for two or three months during the middle of winter.  These positions seem to be available all around the United States, and they offer outstanding pay rates and even benefits that are normally associated with full-time work such as a 401(k) plan.

  This concept of travel nursing seems to have evolved and changed over the years quite a bit.  As we continue to dig within the book of medicine, we are repeatedly reminded that the book was written 90 years ago for an audience primarily consisting of mothers caring for their families and nurses in remote locations where other medical care was unavailable.  A single doctor might cover a single town or even a county or territory back then.  A traveling nurse back then might have to go by horseback to take care of an ailing patient, or they might work in a hospice or alms house typically for very low pay if they were paid anything at all.  Room and board were actually the standard pay of the time.

  Fast-forward 90 years and the situation has changed dramatically.  Nursing is very high in demand to the extent that people will actually pay a nurse to travel across the country and work for a few months at a time.  Part of this is probably driven by the shortage of nurses and a number of different areas and part of it probably relates to the fact that elderly and ailing patients are much more mobile these days.  It has been very common for a couple decades now for people to travel south for the winter to Florida or Phoenix or even Southern California.  This influx of people that need medical attention seems to be matched by nurses that are willing to go to those locations and work.  Furthermore, were not necessarily talking about a live-in nurse that works 24 hours a day taking care of an elderly patient, were talking about a nurse that works a shift sometimes in a home sometimes a hospital or other medical facility.  That leaves pony of time for a real life after hours and many opportunities to explore the location that they’re visiting.