Canada balsam pitch is a type of tree resin that is commonly used in microscope slides and woodworking. The spelling of this word is influenced by its pronunciation, which can be expressed as /kəˈnædə bɔːlsəm pɪtʃ/. The first syllable is pronounced with a schwa sound, or a short "uh" sound, followed by the stressed syllable "na." The second part of the word, "balsam," is pronounced with a long "aw" sound, while the final syllable "pitch" is pronounced with a short "i" sound.
Canada balsam pitch is a highly esteemed resinous substance obtained from the balsam fir tree (Abies balsamea). It is characterized by its viscous, sticky, and transparent nature. The pitch is typically extracted by making incisions or wounds on the trunk of the balsam fir, allowing the resin to flow out and collect into a hardened mass or in small globules on the tree trunk. This process is primarily carried out in Canada, which gives rise to its name.
Canada balsam pitch has long been used for various purposes due to its unique properties. It is widely employed in the manufacturing of optical lenses, particularly microscope slides and lenses for traditional hand lenses, due to its exceptional optical clarity. The transparent and refractive nature of the balsam pitch enables it to eliminate the refractive index mismatch between the glass slide and the mount, thereby improving light transmission and producing sharper images. Additionally, Canada balsam pitch is also utilized as a varnish, adhesive, and as an ingredient in various pharmaceutical products.
Its applications go beyond science and art. In medicine, it has been utilized historically for its antiseptic and anti-inflammatory properties. Canada balsam pitch is known for its healing potential and has been applied externally to treat wounds, burns, and skin irritations. It is also employed in veterinary medicine, providing a soothing effect on minor injuries and aiding in the healing process.
Overall, the distinctive characteristics and valuable attributes of Canada balsam pitch make it a sought-after natural material in various fields, from microscopy to traditional medicine.
Pix canadensis.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.