-
Articles/Ads
Article REVIEWS OF HEW BOOKS ← Page 2 of 2
Note: This text has been automatically extracted via Optical Character Recognition (OCR) software.
Reviews Of Hew Books
Order . The-work is a collection of pieces adapted for recitation or reading during a leisure hour , selected from the works of distinguished ancient and modern authors , including Young , Sheridan , Shelley , the lamented L . E . L ,, Shakspere , Campbell , Addison , Eliza Cook , Southey , Colman , Walter Scott , Robert Burns , Moore , Byron , Rogers , Bloomfield , ' Bowring , Hood , Mary HoAvitt , Bernard Barton , ( jharles Mackay , Milton , Kirke White , and many others . The selection is Avell made , and ivill be equally acceptable to the Freemason as to the Odd FcIIoav .
The Ophthalmoscope : its Mode of Application explained and its Value shown in the Exploration of internal Diseases affecting - tlie Eye , by Jabez Hogg , author of " The Microscope : its History , & c . " London : Churchill , Ncav Burlington Street . —Bro . Hogg , A \ dio is assistant surgeon to the Royal Westminster Ophthalmic Hospital , has produced a Avork which cannot fail to prove of great utility to the profession , whilst it will be studied
with interest by the non-professional reader ; there being no organ of the human body more delicate than the eye , and none Avhose loss Avould be more severely felt . The instrument , the nature and . ' powers , of Avhich Bro . Hogg so Avell describes , Avas first invented by an Englishman—Mr . dimming—though the inA ention is claimed for Germany , it being in that
country that its value aa as first acknoAvledged . The ophthalmoscope is formed on the principle that the human eye , as Avell as that of certain animals , are to a considerable extent mirror-like ; and by magnifying or dilating the pupils a means is afforded of seeing the retina and choroid in everv case . Bro . Hogg says : —
" The ophthalmoscope I make use of , is a small circular mirror of about ten inches focus , in fact a small sized mirror made for the ordinary microscope , having a hole bored in its " centre , and mounted in a piece of tortoiseshell . The rays from the flame of the lamp , reflected by the concave mirror , fall in a state of convergence on a convex lens , in front of the eye under examination . The rays of light are so much converged by the additional refraction they undergo on entering the eye , that they quickly come to a focus , cross , and are dispersed over the retina , and thus
this membrane is fully illuminated . The observer ' s eye looks through the small central aperture in the middle of the concave mirror ; this he holds in his hand . The patient , whose eye is about to be examined , should he taken into a darkened room and seated by the side of a table , on which is placed an ordinary lamp . The lamp may be brought somewhat near to the patient ' s ear , and the flame so arranged that it shall be in a straight line Avith the patient's eye , but lower than the eye of the observer , who is seated in the front of the patient , on a stool capable of being
raised . As a rule , it is better to sit a little higher than the patient . The reflecting surface of the instrument is then to be turned towards the patient ' s eye , in such a way that the eye of the observer , when looking through the small central hole , may see , upon turning the instrument a little inwards , a luminous reflection of its interior . On withdrawing it gradually , the reflection grows smaller , until it
becomes oblong and very brilliant . It is in this way , or slightly modified according to circumstances , that the alterations in the several structures of the eye , arc to be observed . In the examination of most eyes we arc obliged , for the sake of seeing the changes more clearly , to use the bi-convex lens , of about tAVO inches focus . Short-sighted eyes Ave are enabled to see into Avithout this lens . "
In this Avay the medical attendant is enabled to discover the nature of disease in the eye , and therefore to treat it Avith greater certainty than has hitherto been the case . The ivork is of considerable value , and is illustrated by various eases Avhich have come under the notice of the author , and which will , no doubt , render it peculiarly acceptable to the profession of which our Bro . Hogg is so distinguished a member .
Note: This text has been automatically extracted via Optical Character Recognition (OCR) software.
Reviews Of Hew Books
Order . The-work is a collection of pieces adapted for recitation or reading during a leisure hour , selected from the works of distinguished ancient and modern authors , including Young , Sheridan , Shelley , the lamented L . E . L ,, Shakspere , Campbell , Addison , Eliza Cook , Southey , Colman , Walter Scott , Robert Burns , Moore , Byron , Rogers , Bloomfield , ' Bowring , Hood , Mary HoAvitt , Bernard Barton , ( jharles Mackay , Milton , Kirke White , and many others . The selection is Avell made , and ivill be equally acceptable to the Freemason as to the Odd FcIIoav .
The Ophthalmoscope : its Mode of Application explained and its Value shown in the Exploration of internal Diseases affecting - tlie Eye , by Jabez Hogg , author of " The Microscope : its History , & c . " London : Churchill , Ncav Burlington Street . —Bro . Hogg , A \ dio is assistant surgeon to the Royal Westminster Ophthalmic Hospital , has produced a Avork which cannot fail to prove of great utility to the profession , whilst it will be studied
with interest by the non-professional reader ; there being no organ of the human body more delicate than the eye , and none Avhose loss Avould be more severely felt . The instrument , the nature and . ' powers , of Avhich Bro . Hogg so Avell describes , Avas first invented by an Englishman—Mr . dimming—though the inA ention is claimed for Germany , it being in that
country that its value aa as first acknoAvledged . The ophthalmoscope is formed on the principle that the human eye , as Avell as that of certain animals , are to a considerable extent mirror-like ; and by magnifying or dilating the pupils a means is afforded of seeing the retina and choroid in everv case . Bro . Hogg says : —
" The ophthalmoscope I make use of , is a small circular mirror of about ten inches focus , in fact a small sized mirror made for the ordinary microscope , having a hole bored in its " centre , and mounted in a piece of tortoiseshell . The rays from the flame of the lamp , reflected by the concave mirror , fall in a state of convergence on a convex lens , in front of the eye under examination . The rays of light are so much converged by the additional refraction they undergo on entering the eye , that they quickly come to a focus , cross , and are dispersed over the retina , and thus
this membrane is fully illuminated . The observer ' s eye looks through the small central aperture in the middle of the concave mirror ; this he holds in his hand . The patient , whose eye is about to be examined , should he taken into a darkened room and seated by the side of a table , on which is placed an ordinary lamp . The lamp may be brought somewhat near to the patient ' s ear , and the flame so arranged that it shall be in a straight line Avith the patient's eye , but lower than the eye of the observer , who is seated in the front of the patient , on a stool capable of being
raised . As a rule , it is better to sit a little higher than the patient . The reflecting surface of the instrument is then to be turned towards the patient ' s eye , in such a way that the eye of the observer , when looking through the small central hole , may see , upon turning the instrument a little inwards , a luminous reflection of its interior . On withdrawing it gradually , the reflection grows smaller , until it
becomes oblong and very brilliant . It is in this way , or slightly modified according to circumstances , that the alterations in the several structures of the eye , arc to be observed . In the examination of most eyes we arc obliged , for the sake of seeing the changes more clearly , to use the bi-convex lens , of about tAVO inches focus . Short-sighted eyes Ave are enabled to see into Avithout this lens . "
In this Avay the medical attendant is enabled to discover the nature of disease in the eye , and therefore to treat it Avith greater certainty than has hitherto been the case . The ivork is of considerable value , and is illustrated by various eases Avhich have come under the notice of the author , and which will , no doubt , render it peculiarly acceptable to the profession of which our Bro . Hogg is so distinguished a member .