"They are accordingly found on the mountainour parts of Yorkshire, Lancashire, Cumberland, and Westmoreland; over the whole of the Lammermuir range, the upper part of Lanarkshire, and generally over the Highlands of Scotland. Both male and female of this breed have horns, which in the former are very large and spirally twisted. The face and legs are black or specked with black, with an occasional tendency to this color on the fleece; but there is nothing of the brown or russet color which distinguishes the down breeds." — Encyclopedia Britanica, 1893

Black-Faced Heath Sheep

"They are accordingly found on the mountainour parts of Yorkshire, Lancashire, Cumberland, and Westmoreland;…

Exposure of the right maxillary sinus, after removal of facial muscles. The (*) indicates the opening (Ostium maxillare) of the maxillary sinus into the nose.

Dissection of the Maxillary Sinus

Exposure of the right maxillary sinus, after removal of facial muscles. The (*) indicates the opening…

Right pterygopalatine fossa, from without. The greater portion of the ala magna oss. sphenoid., of the lateral part of the corpus maxillae and of the pars orbit. oss. front. have been removed by a sagittal section, exposed the medial wall of the sinus maxillaris and of the orbit. Labels: **, indicate a probe through the Foramen rotundum; *, indicates a probe through the Canalis pterygoideus.

Pterygoid Fossa and Maxillary Sinus

Right pterygopalatine fossa, from without. The greater portion of the ala magna oss. sphenoid., of the…

The skull at birth, from before.

Skull at Birth from Before

The skull at birth, from before.

The skull at birth, lateral aspect.

Lateral Aspect of Skull at Birth

The skull at birth, lateral aspect.

Inner aspect of outer wall of right nasal fossa.

Side View of Skull Showing Nasal Cavity

Inner aspect of outer wall of right nasal fossa.

Portion of right half of skull, showing posterior wall of sphenomaxillary fossa. The superior maxilla, ethmoid, and part of malar have been removed.

Skull Showing Posterior Wall of Sphenomaxillary Fossa

Portion of right half of skull, showing posterior wall of sphenomaxillary fossa. The superior maxilla,…

Lateral view of skull with zygomatic arch removed.

Lateral View of Skull

Lateral view of skull with zygomatic arch removed.

A sneeze is a semi autonomous, convulsive explosion of air form the lungs through the nose and mouth, usually caused by foreign particles irritating the nasal mucosa.

Sick Man Sneezing

A sneeze is a semi autonomous, convulsive explosion of air form the lungs through the nose and mouth,…

An illustration of Socrates, a Classical Greek philosopher. Credited as one of the founders of Western philosophy, in reality he is an enigmatic figure known only through other people's accounts. It is Plato's dialogues that have largely created today's impression of him.

Socrates

An illustration of Socrates, a Classical Greek philosopher. Credited as one of the founders of Western…

The sphenoid as seen from behind.

Sphenoid Viewed from Behind

The sphenoid as seen from behind.

The sphenoid as seen from the front.

Sphenoid Viewed from the Front

The sphenoid as seen from the front.

Two men using a telephone.

Telephone

Two men using a telephone.

The inner surface of the left temporal bone at birth.

Temporal Bone at Birth

The inner surface of the left temporal bone at birth.

Temporal bone at birth. Inner aspect.

Inner Aspect of Temporal Bone at Birth

Temporal bone at birth. Inner aspect.

Temporal bone at birth. Outer aspect.

Outer Aspect of Temporal Bone at Birth

Temporal bone at birth. Outer aspect.

Development of the temporal bone. From ten centers.

Development of Temporal Bone

Development of the temporal bone. From ten centers.

Diagram used to prove the theorem: "The sum of two face angles of a trihedral angle is greater than the third."

Face Angles of Trihedral Angle

Diagram used to prove the theorem: "The sum of two face angles of a trihedral angle is greater than…

Vomer bone, a single bone placed at the back part of the nasal cavity, and forms part of the septum of the nasal fossae.

Human Vomer Nasal Bone

Vomer bone, a single bone placed at the back part of the nasal cavity, and forms part of the septum…

Sagittal section of face, a little to the left of the middle line, showing the vomer and its relations.

Section of Face Showing Vomer

Sagittal section of face, a little to the left of the middle line, showing the vomer and its relations.

Woman's face with glasses.

Woman

Woman's face with glasses.

Woman's face with hair bow.

Woman

Woman's face with hair bow.

Woman with hat, right profile.

Woman

Woman with hat, right profile.

An illustration of a woman's face.

Woman

An illustration of a woman's face.

An illustration of the face of a young woman.

Woman

An illustration of the face of a young woman.

A profile illustration of a woman.

Woman (Profile)

A profile illustration of a woman.

Woman receiving massage.

Woman receiving massage

Woman receiving massage.

Woman receiving massage.

Woman receiving massage

Woman receiving massage.

Woman receiving massage.

Woman receiving massage

Woman receiving massage.

An illustration of the profile of a woman wearing a bonnet.

Woman with Bonnet

An illustration of the profile of a woman wearing a bonnet.

Face of a young girl looking up and toward the left.

Young girl

Face of a young girl looking up and toward the left.