Why is this sign called a dog? - briefly
The sign in question is known as "Dog" due to its resemblance to a dog's profile when viewed from certain angles. This association has become widely accepted in various fields, particularly in aviation and nautical navigation, where it serves as a straightforward reference point for direction and orientation.
Why is this sign called a dog? - in detail
The sign in question, often referred to as "dog," has its origins deeply rooted in the history of typography and printing. This term is not a colloquial or casual reference but rather a specific technical designation used within the industry.
In the world of typesetting, a "dog" refers to a piece of lead that is used to fill out lines of type to ensure they are evenly spaced and aligned. The term itself is derived from the Dutch word "hond," which means "dog." This connection can be traced back to the early days of printing in Europe, particularly in the Netherlands, where such pieces of lead were commonly referred to as "honden" or "little dogs."
The use of these lead pieces serves a crucial purpose in typesetting. When composing text, it is essential that each line of type ends at the same point on the page. This uniformity is vital for maintaining readability and aesthetic appeal. By inserting these lead pieces, known as "dogs," printers can adjust the spacing between words or lines to achieve this consistency.
Moreover, the term has evolved over time to encompass not just the physical pieces of lead but also the spaces they create in the text. In modern typesetting software, for instance, these spaces are often referred to as "dogs" as well, acknowledging their historical and functional significance.
In summary, the sign called a "dog" plays an essential role in the art and science of typesetting. Its name is a reflection of its origins and functions, serving as both a technical term and a nod to the rich history of printing and typography.