Renseignements généraux

Nº de série

S/O

Nº de partie

3

Nombre total de parties

6

Ou

S/O

Brevets

S/O

Description générale

non-ferrous metal

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

30,5 cm

Largeur

17,9 cm

Hauteur

S/O

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Imprimerie

Catégorie

Formes d'impression

Sous-catégorie

S/O

Fabricant

Ou

Inconnu

Pays

Inconnu

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Canada

État/province

Québec

Période

Inconnu

Canada

A printing plate from a collection used by the les Soeurs de la Charité de Montreal, the Sisters of Charity of Montreal (Soeurs Grises/Grey Nuns). The order was established by Mme Marguerite d'Youville in Montreal in 1737 to serve to poor and sick. The Grey Nuns run hospitals, orphanages, schools, homes for the aged, institutions for the blind, and other social services and works of charity in various parts of Canada and the United States. D'Youville was officially recognized as a Saint of the Roman Catholic Church in 1990. These plates were acquired by les Souers Grises from l'Institut Nazareth, which utilized them for printing the Institut's publications. L'Institut Nazareth is a co-educational school for blind children, founded in 1862 in Montreal by Benjamin-Victor Rousselot and the Grey Nuns. Music was a part of the general curriculum from the outset. The newspapers of the time describe annual concerts which introduced both first-rate performing talents and important new works to the Montreal public and a choir whose reputation led to tours of the province. Many considered the school the earliest conservatory in Montreal. The Institut Nazareth merged with the Institut Louis-Braille in June 1975, continuing thereafter as the Institut Nazareth et Louis-Braille, located in Longueuil, Quebec [Refs. 1-4].

Fonction

A metal plate used in a printing press to transfer an image to paper, in this case by creating raised dots forming Braille lettering representing Latin abbreviations.

Technique

Examples of Braille embossed printing plates. Braille is a tactile system of raised dots representing letters of the alphabet. To read braille, the fingers gently glide over paper that has been embossed with the braille code. For note taking, a pointed instrument is used to punch out the dots on paper held in a metal slate. The readable raised dots appear on the other side of the paper. Braille has been an effective means of communication for people who are blind since 1829 when it was invented in Paris, France by Louis Braille. Louis Braille lost his sight at the age of three as a result of an eye injury. As a young boy at school, he became frustrated with the large and bulky raised letter alphabet used to learn reading and writing skills. Later in his life, a French artillery officer, Charles Barbier de la Serre, gave him the idea of reading by a tactile code. After many years of experimenting, Louis Braille developed a successful reading and writing system that today is used around the world. The basis of the braille system is known as a braille cell. The cell is comprised of six dots arranged in a grid of two dots horizontally by three dots vertically. The dots are conventionally numbered 1, 2, and 3 from the top of the left column and 4, 5, and 6 from the top of the right column. The presence or absence of dots gives the coding for the symbol. Dot height is approximately 0.02 inches (0.5 mm); the horizontal and vertical spacing between dot centers within a Braille cell is approximately 0.1 inches (2.5 mm); the blank space between dots on adjacent cells is approximately 0.15 inches (3.75 mm) horizontally and 0.2 inches (5.0 mm) vertically. A standard Braille page is 11 inches by 11.5 inches and typically has a maximum of 40 to 43 Braille cells per line and 25 lines. [Refs. 4-6].

Notes sur la région

Inconnu

Détails

Marques

raised dots in patterns representing Braille letters

Manque

complete

Fini

grey

Décoration

S/O