How is malaria carried by the mosquito?-best imagined that a man has returned from some malarial country takes up his abode in a healthy, yet mosquito infested village.  This man may be fairly over his attack yet he still suffers from an occasional chill with fever.  He has no screens in his house, nor have his neighbors, unless previously told to follow such cautions.  A female as Cato are several attack in and stuck his blood which contains these tiny parasites.  The mosquito takes millions of the little parasites which then undergo a development in the body of the insect and can be seen microscopically in the stomach and intestine, and the small glands in its mouth, which secrete saliva.  Now let us follow the mosquito and see what harm it can cause any community.  It flies through a screen door or window and lights on the arm, etc., of an unsuspecting neighbor.  Inviting a person the mosquito ejects or gives off its saliva into the womb to eight in diluting the blood of a person which it has been, as the blood is too thick to be sucked up to the tiny tube in the bill (proboscis) of the mosquito.  In this way the bite of the female mosquito whose body contains a small animal error sites which cause malaria, as by means of the saliva into the blood of the person during the act of sucking up the blood.  Does the mosquito sucks up the blood of the individual and in exchange injects into his blood the saliva contains parasites.  These parasites multiply in the blood of the person bitten and produce poisons which give rise to the chills, fever, aching limbs, etc., known as malaria, malarial fever or "odd," (chills and fever).  It can readily be seen how malaria will spread when individuals in the community have millions of parasites in the blood, and at the same time as Cato's are carrying around in their bodies, millions of the same living germs which they sought from the blood of the infected person, develop and inject them into the blood of every person they bite.

You will notice as you read the follow on sections covering Mosquitos and Malaria that the book is big on talking about where they live, but not terribly practical on how to actually deal with the insects.  There are more references to different possible breeding places than there are gears in a Patek Gondolo watch.

Additional Articles from the Book of Medicine:

• Impure Ice As a Cause of Diarrhea.
  
  

  Impure Ice As a Cause of Diarrhea.  — the fact that ice is now used by almost all classes to an extent which entitles it to rank rather as a necessity than, as formally, as a luxury of life, renders it important that its purity should be is jealously guarded as the water supply.  It is popularly believed that water freeze itself from dangerous organic matter, as it does to a great degree from certain saline contaminations during the process of freezing, and also that the vegetable or animal germs of typhoid and other fevers are killed, or at least rendered sterile, by congelation of the water in which they exist.  Both these ideas are, however, unquestionably running us, as has been repeatedly proved by the various experiments which ignorant hotel keepers try without the least intending it, upon their guests, on a scale which would have the oldest vivisector stand aghast before the suffering inflicted, even if it were only upon the brutes which form the subjects of his researches.

• BONES OF THE HEAD, BASE AND NECK.
  
  

  
  

  Bones of the Skull — this illustration gives an accurate and faithful representation of the head, face and neck, surrounded by an outline of the fleshy parts as they appear in the human frame. The bones of the head, eight in number, constitute the skull, and those of the face, 14 and number, compose a strong, hard bony case, which encloses and affords a suitable protection for the brain and the four organs a special sense, viz.: site, smell, taste and hearing. All of these bones are in movable, except the lower jaw, which moves by means of a hinge-joint, and permits of the opening and closing of the mouth.

  One of the things that struck me as I dictated this last segment (for my readers information I am using Dragon Naturally Speaking to dictate this text as well as my views on the text) was the large number of commas as used in this paragraph. By my count there were 15 used in this paragraph which had three sentences. Now this book in general uses the coma extensively and reminds me of a style of writing that I was taught in grade school shortly before several rules of language were simplified. For example when I was in grade school I was taught that a conjunction that included the word “and” should have a coma in between each item building up to the conjunction including the last word that preceded the word “and.”

  Back then I would’ve drafted this sentence as follows:
  I went to the store, the post office, the car wash, and the bank.

  Later in high school some economy of writing came about and decreased 1 of the commas needed in writing. I don’t know when or why this occurred, but I do recall several grammar teachers remarking on the fact and teach in is the new writing style. Back then I didn’t follow the news quite to the extent that I do today and so I do not recall whether there was a boost in the global economy due to the increased productivity allowed workers especially “knowledge workers” who would not have had to write, type or dictate quite as many commas. In fact they would have one less coma to write. Can you imagine what everyone did with all that extra time saved him from writing?

  Now honestly one coma probably to make that big of a difference. But now as I read the library of health I realize that over the last 82 a hundred years the world hasn’t saved just one coma; they have saved close to a dozen per paragraph. Computers may have brought a significant amount of productivity to the workforce, but just imagine how much we’ve saved over the last hundred years writing fewer comas.

  I wonder when the majority of the comas as were lost. Maybe it was the result of World War I or World War II or the combination of both wars. It’s possible that to expedite communications Society had to adapt and reduce the number of dits in das used in a telegraph. The war to end all wars may have failed in Indian all wars, but it may have succeeded in putting an end to a few extra comas.

• Applying the Test for Lead
  
  

  Applying the Test for Lead. — the sulfide of ammonium may be purchased at a small cost, save for $.25 an ounce, of most dealers and chemicals; and, as its odor is extremely disagreeable, it should be carefully corked until the moment it is used. The experiment should be made upon half a pint of the suspected water; and, if the contamination is supposed to be caused by lead pipes, it is a good plan to test a portion of the liquid which has stood overnight in the conduits. The mode of discriminating the precipitate caused by iron from those due to the dangerous metals, lead and copper, is to let fall a few drop of hydrochloric acid, called also muriatic acid, into the fluid. If the brownish or yellowish brown tent disappears, we may know that innocent iron is the only metallic impurities; whilst if, on the contrary, no change is effected by the addition of the acid, one of the poisonous metals, better copper, is present. No water, however, in which the slightest change is produced by adding the sulfide of ammonium, should be swallowed by man or beast until a rigid investigation by a competent water analyst has proved it to be harmless.

  I somehow doubt that sulfide of ammonium costs that amount today.  Its probably either much more expensive or sold in ridiculous bulks at every grocery store, pharmacy and gas station next to the Phentermine in one of those combination aisles that sells just a little bit of everything, but never the thing you really need.