Wordpress PHP List Limited to 10 Items

I'm helping out with a Wordpress site.  This client has a list of projects on a page that seems limited to displaying only the most recent 10 posts tagged as projects.  In looking at the PHP for this page, however, I can't find the variable that is restricting the list to only the most recent 10.  To confirm, there are currently 12 projects, only 10 listed, and if I create a new test project post, the oldest of the 10 is temporarily bounced from the list.  Could somebody suggest where to look so that I could expand the list to all project posts?  Current PHP for this page follows.

Thanks in advance!

<?php get_header(); ?>

<div id="content">

	<div id="contentleft">

        <div class="postarea">

            <?php if (have_posts()) : while (have_posts()) : the_post(); ?>

            <div class="posttitle">
            	<h3><?php the_title(); ?></h3>
            </div>

            <?php endwhile; else: ?>

            <p><?php _e('Sorry, no posts matched your criteria.'); ?></p>

			<?php endif; ?>
            	<?php
				echo '<div class="projects">';
				echo '<ul class="project-list">';
				$my_query = new WP_Query('post_type=project');
				if($my_query->have_posts()) : while($my_query->have_posts()) : $my_query->the_post();
					echo '<li><span><a href="#' . get_the_ID() . '" rel="facebox">';
					if(has_post_thumbnail()){
						the_post_thumbnail('project-thumbnail');
					}
					echo '</a><div class="expanded" id="' . get_the_ID() . '">';
					if(has_post_thumbnail()) {
						the_post_thumbnail('content-image');
					}
					echo '<br/>';
					echo '<h1>' . get_the_title() . '</h1>';
					the_content();
					echo '</div>';
					echo '</span><br/>';
					echo '<strong>' . get_the_title() . '</strong>';
					the_excerpt();
					echo '</li>';
				endwhile; endif;
				wp_reset_query();
				echo '</ul>';
				echo '<div class="clear"></div>';
				echo '</div>';
				wp_reset_query();
				?>

				<?php the_content(__('Read More'));?><div style="clear:both;"></div><?php edit_post_link('(Edit)', '', ''); ?>

        </div>

	</div>

<?php include(TEMPLATEPATH."/sidebar_right.php");?>

</div>

<!-- The main column ends  -->

<?php get_footer(); ?>

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