LOCAL   INFECTION—An   infection   of   the skin  or  scalp  indicated  by  a  boil  or  pimple containing  pus. MAGNIFYING   GLASS—Used   to   identify substances  by  magnification. MAIN   SPOTTING   BOARD—   A   worktable consisting of a smooth area used for tamping and applying  spotting  agents  and  a  perforated  area used  for  flushing. MANUAL   MODE—An   equipment   mode during which the equipment is operated without the  use  of  automatic  devices. MANUFACTURE   DATE—The   date   a particular   item   of   stock   was   manufactured; indicated  on  the  container  of  the  item  as  a manufacturer’s  code.  These  codes  are  currently contained  in  NAVRESSO  INST  4067.4. MANUFACTURED  ITEMS—Items  that require further processing in the snack bar such as  popcorn. MARKDOWN—A  voluntary  reduction  in  the selling price of an item. There are three types of markdowns:  markdowns  below  cost,  markdowns to  zero,  and  retail  markdowns. MARKDOWN  BELOW  COST—A  voluntary reduction in the selling price of an item below its original  cost  price. MARKDOWN   TO   COST—A   type   of   retail markdown  in  which  the  selling  price  of  an  item is  reduced  so  that  it  is  equal  to  its  cost  price. MARKDOWN  TO  ZERO—An  expenditure of stock through a price change that reduces the value  of  the  item  to  zero. MARKON—Any   voluntary   increase   in   the established  selling  price  of  an  item. MARKUP—The  difference  between  the  cost price  and  selling  price  of  a  retail  item. MECHANICAL  ACTION—The  force  that  is applied as an expedient in the removal of soil from fabrics  in  the  laundry. METALLIC   INSTRUMENTS—Barbering equipment  that  is  made  of  metal. MONETARY—A term used in the ship’s store operation  referring  to  money. NONMETALLIC    INSTRUMENTS—Barber- ing  equipment  that  is  not  made  of  metal. NONPATHOGENIC   BACTERIA—Bacteria that  do  not  cause  disease. NSA—Navy  Stock  Account  is  the  inventory of supplies purchased from the Navy Stock Fund that  have  not  yet  been  expended  to  end  use. NSF—The  Navy  Stock  Fund  is  a  revolving fund that finances the purchase or manufacture of supplies and services that are to be taken up in  the  Navy  Stock  Account  (NSA). ORLON   ACRYLIC—A   synthetic   fiber chemically   composed   of   acrylonitrile. OVERRING—An  incorrect  higher  price  for an  item  rung  up  on  a  cash  register. OXALIC   ACID—A   poison   powder   used   to remove  rust  from  clothing. PADDED ROLLS—The rolls on the flatwork ironer  that  smooth  and  flatten  fabrics  to  the heated cylinders. PARAFFINED   CLOTH—A   cloth   saturated with wax for use in waxing the flatwork ironer. PATHOGENIC    BACTERIA—Bacteria    that attack plant or human tissue and cause disease. PERFORATED   BASKET—The   rotating basket  within  the  tumbler  dryer. PERMANENT HARDNESS—That character- istic  of  water  that  contains  calcium  and magnesium  chlorides  unaffected  by  boiling. POOR  BARBER  ETHICS—Bad  rules  and standards  for  conduct  and  practice  in  the barbershop  that  reflect  poorly  on  the  way customers  feel  about  the  barbershop. POSITIONING   INTERLOCK   SWITCH— Safety  device  that  eliminates  the  possibility  of having the washer motor activate while the outer shell  door  is  open. POTASSIUM  IODIDE—A  white  crystalline or  powdered  substance  used  for  removing  silver nitrate and other silver stains. AI-7