264 
Transactions of the Society. 
Optical Instrument, called an’ Accurate Delineator, which, amongst its 
many Perfections, intirely obviates the Defects of the Camera Obscura, 
as it may not only be used without the Assistance of the Sun in the 
Day Time, but also equally of Use by Candle Light, for drawing the 
Human Face, inside of Looms, Buildings, Perspectives, Landscapes, 
Foilage and Fibres of Trees and Flowers, it exactly representing the 
Same, large or small, with the true Outlines, Lights, Shades, and 
Colours.” Storer describes his invention as follows : — “ The accurate 
delineator may be made of various forms, and the effects above 
mentioned arise from a new-invented application of lenses, mirrors, 
speculums, prisms, or mediums of lenses of glass, or any composition 
containing reflecting or refracting powers. The rays from the object 
are at first received on or conveyed to a mirror or speculum placed at 
a proper angle in the inside of a tube or box by one or more convex 
lens or medium of lenses before the mirror or speculum. In cases 
where the object is conveyed thro’ a lens or medium of lenses on the 
mirror or speculum, one or more convex lenses or medium of lenses 
must be applied to correct and illuminate the rays, and to receive from 
the mirror or speculum the rays from the objects conveyed thereon 
through the first-mentioned lens or medium of lenses ; but in cases 
where the rays from the objects are received in the first place on the 
mirror or speculum, a convex lens or medium of lenses must be placed 
fixed or moveable next after the mirror or speculum, to collect the 
rays from the mirror or speculum ; and at a proper distance from the 
first lens or medium of lenses must be applied one or more convex 
lens or medium of lenses, to correct and illuminate the rays from the 
first lens or medium of lenses, by which means all rays that are spheri- 
cally refracted through the first medium will be made parallel, and con- 
sequently all objects are accurately represented and all parts thereof 
equally illuminated on the lens or medium lenses so receiving and 
correcting the rays of the objects received from the mirror or speculum, 
or first lens or medium of lenses, and gives the most lively and exact 
representation of the objects, either by the light of the sun, moon, or 
any other light. In all cases the size of the aperture or medium 
through which the rays first pass must govern the size and powers of 
the correcting lens or medium, both contrary to the principles of the 
camera obscura. A prism, mirror, or speculum placed at a proper 
angle to reflect the image on the first lens or medium of lenses, 
mirror, or speculum, the objects will be represented in their true 
shape, figure, and form ; and a collecting or correcting lens or lenses, 
or medium of lenses to collect or correct the rays from the images 
presented by a reflecting microscope, magick lanthorn, camera obscura, 
and other instrument of the like nature, instantly forms the accurate 
delineator, the principals of the accurate delineator being not so much 
in the form or figure of the instrument, as to collect and correct and 
illuminate the faint and imperfect rays from the objects received 
thro’ these instruments.” 
