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 | Knock here A sign in both the British and United States hobo systems. |
 | Medical care A sign from the United States hobo system indicating that care will be given to the sick at this location. |
 | Lapis lazuli (alchemy) A sign used in alchemy for lapis lazuli. |
 | Legal building A United States hobo sign indicating a police station or law court. |
 | Watch out Although this sign has astrological as well as meteorological significance, in the United States system of hobo signs, it means that authorities are on the watch and to be careful. |
 | Dont' worry Although this sign has astrological as well as meteorological significance, in the United States system of hobo signs, it means that people in the area leave hobos alone and there is no need to be af… |
 | Pebbles (alchemy) A sign in alchemy used to represent pebbles. It can also stand for the colorless variety of quartz known as rock crystal. |
 | Hot fire (alchemy) A sign used in alchemy to represent a particularly intense flame. |
 | Phosphorus (alternate #2) A sign used in early chemistry to represent phosphorus. |
 | Water (alternate #1) An alternate alchemical sign for the element of water, dating from the seventeenth century. |
 | Water (alternate #2) An alternate alchemical sign for the element of water, dating from the fifteenth century. |
 | Week (alchemy) A time sign used in alchemy to indicate a week. |
 | Easy access or resistance A hobo sign that has distinctly different meanings depending on the system in question. |
 | Brass (alchemy) A sign used in alchemy to represent the metal brass. |
 | Forge (alchemy) A sign used in alchemy to indicate a forge or melting oven. |
 | Day (alchemy) While this symbol can have different meanings in different fields, in the alchemical traditions of the Middle Ages it was used as a "time sign" to indicate day. |
 | Mars (alternate) Although this sign isn't often used, in alchemy it is an alternative symbol to indicate the planet Mars. |
 | Melting (alchemy) A sign used in alchemy to indicate melting or digestion. |
 | Ammonium salt (alternate #3) A sign for ammonium salt, also known as "sal ammoniacus", used in 18th century chemistry. |
 | Lead (alternate #1) In alchemy, lead is most commonly represented by the astrological sign for the planet Saturn (for full details, see the symbol for 'Lead'), but this symbol serves the same purpose. |
 | Lead (alternate #2) In alchemy, lead is most commonly represented by the astrological sign for the planet Saturn (for full details, see the symbol for 'Lead'), but this symbol serves the same purpose. |
 | Acetic acid\vinegar (alternate #2) A sign used in 17th century alchemy to indicate a distilled form of vinegar. |
 | Calcinated copper (alchemy) A sign used in 17th century alchemy to designate calcinated copper. |
 | Calcinated copper (alternate #1) A sign used in 17th century alchemy to designate calcinated copper. |
 | Calcinated copper (alternate #2) A sign used in 17th century chemistry to designate calcinated copper. |
