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"Additional space at the ends of sentences is called 'French Spacing.' It is a very old practice, having been commonplace in books up through the 19th century" [7] "Adding two spaces after a period is called French spacing. French spacing was quite common in books before the 19th century. Later it became the norm for typewritten copy." [8]
Sentence spacing concerns how spaces are inserted between sentences in typeset text and is a matter of typographical convention. [1] Since the introduction of movable-type printing in Europe, various sentence spacing conventions have been used in languages with a Latin alphabet. [2]
I typed two spaces after every period on punch cards, on paper tape, in FØRTRAN comments, in SNOBOL comments, in C comments, in every computer context that wasn't going to be parsed by machine. I typed two spaces after every period in TECO, in RUNOFF, in Word-11, in AppleWriter, in WordStar.
Historical style guides before the 20th century typically indicated that wider spaces were to be used between sentences. [3] Standard word spaces were about one-third of an em space, but sentences were to be divided by a full em-space.
Using cryo-electron microscopy it has been found that a much smaller periplasmic space is also present in Gram-positive bacteria (more accurately "monoderm"), between cell wall and the plasma membrane. [1] [2] The periplasm may constitute up to 40% of the total cell volume of gram-negative bacteria, but is a much smaller percentage in gram ...
The International System of Units (SI) prescribes inserting a space between a number and a unit of measurement (the space being regarded as an implied multiplication sign) but never between a prefix and a base unit; a space (or a multiplication dot) should also be used between units in compound units. [23] 5.0 cm, not 5.0cm or 5.0 c m or 5.0 cms
The secondary cell wall, a thick layer formed inside the primary cell wall after the cell is fully grown. It is not found in all cell types. It is not found in all cell types. Some cells, such as the conducting cells in xylem , possess a secondary wall containing lignin , which strengthens and waterproofs the wall.
The cell envelopes of the bacterial class of mollicutes do not have a cell wall. [5] The main pathogenic bacteria in this class are mycoplasma and ureaplasma. [5] L-form bacteria are strains bacteria that lack cell walls derived from bacteria that normally possess cell walls. [6]